diff --git a/最后两周/C语言同步练习答案.md b/最后两周/C语言同步练习答案.md
new file mode 100644
index 0000000..833745e
--- /dev/null
+++ b/最后两周/C语言同步练习答案.md
@@ -0,0 +1,1051 @@
+## ѡ��ṹ
+
+### ѡ��ṹ-1
+
+![image-20250220225958223](https://yp.smallkun.cn/markdown/image-20250220225958223.png!compress)
+
+```c
+#include <stdio.h>
+
+/*
+if(����){
+	�������(����Ϊ��ʱִ��) 
+}else{
+	�������(����Ϊ��ʱִ��) 
+}
+*/
+int main(void){
+
+	int x, y, z, t;//�����������ͱ���
+	//�������� ������1, ������2;
+	scanf("%d%d%d", &x, &y, &z);
+	if(x > y){
+		t = x;
+		x = y;
+		y = t;
+	}//ʵ��x��y�Ƚ� ������yλ�� 
+	if(y > z){
+		t = y;
+		y = z;
+		z = t;
+	}//ʵ��y��z�Ƚ� ������zλ�� zΪ���������������
+	if(x > y){
+		t = x;
+		x = y;
+		y = t;
+	}
+	printf("%d %d %d\n", x, y, z);
+	
+	return 0;
+}
+
+```
+
+### ѡ��ṹ-2
+
+![image-20250220230052521](https://yp.smallkun.cn/markdown/image-20250220230052521.png!compress)
+
+```c
+#include <stdio.h> 
+
+int main(void){
+	
+	
+	int a;
+	
+	scanf("%d", &a);
+	printf("������λ��Ϊ%d\n", 
+	(a/10==0?1:(a/100==0?2:(a/1000==0?3:(a/10000==0?4:5)))));
+	printf("%d", a%10);
+	if(a%100/10 != 0){
+		printf("%d", a%100/10);
+	}
+	if(a%1000/100 != 0){
+		printf("%d", a%1000/100);
+	}
+	if(a%10000/1000 != 0){
+		printf("%d", a%10000/1000);
+	}
+	if(a/10000 != 0){
+		printf("%d", a/10000);
+	}
+	printf("\n");
+	return 0;
+}
+
+```
+
+### ѡ��ṹ-3
+
+![image-20250220230133563](https://yp.smallkun.cn/markdown/image-20250220230133563.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(void){
+	
+	float a, b, result;
+	int flag;
+	printf("��������������:");
+	scanf("%f %f", &a, &b);
+	printf("��������Ҫ���еIJ���(1.���ӷ� 2.���˷� 3.������):");
+	scanf("%d", &flag);
+	switch(flag){
+		case 1:result = a+b;break;
+		case 2:result = a*b;break;
+		case 3:result = a/b;break;
+	}
+	printf("���Ϊ%f\n", result);
+	
+	return 0;
+}
+
+```
+
+### ѡ��ṹ-4
+
+![image-20250220230626411](https://yp.smallkun.cn/markdown/image-20250220230626411.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(void){
+	
+	int year, month, day, days=0;
+	
+	scanf("%d-%d-%d", &year, &month, &day);
+	days+=day;
+	//1 3 5 7 8 10 12
+	//��ǰһ���¿�ʼ���� 
+	switch(month-1){
+		case 11:days+=30;
+		case 10:days+=31;
+		case 9:days+=30;
+		case 8:days+=31;
+		case 7:days+=31;
+		case 6:days+=30;
+		case 5:days+=31;
+		case 4:days+=30;
+		case 3:days+=31;
+		case 2:days+=28;
+		case 1:days+=31;
+	}
+	if(month>3 && (year%4==0&&year%100!=0 || year%400==0)){
+		days++;
+	} 
+	printf("%d\n", days);
+	
+	
+	return 0;
+}
+```
+
+---
+
+## ѭ���ṹ
+
+### ѭ���ṹ-1
+
+![image-20250220230645828](https://yp.smallkun.cn/markdown/image-20250220230645828.png!compress)
+
+```c
+#include <stdio.h>
+
+
+/*
+1.����ַ���ѭ������
+while((ch=getchar())!='\n')
+
+2.�ж��ַ�����
+ASCALL�뷶Χ 
+
+*/
+int main(){
+	
+	char ch;
+	int l, d, o;//l��ĸ�ĸ��� dΪ���ָ��� oΪ�����ַ�����
+	l=d=o=0;
+	while((ch=getchar()) != '\n'){
+		if(ch >= 'a' && ch<='z' || ch >= 'A' && ch<='Z' ){
+			l++;
+		}else if(ch >= '0' && ch <= '9'){
+			d++;
+		}else{
+			o++;
+		}
+	} 
+	printf("��ĸ����:%d ���ָ���:%d ��������%d\n", l, d, o);	
+	
+	return 0;
+}
+```
+
+### ѭ���ṹ-2
+
+![image-20250220230945704](https://yp.smallkun.cn/markdown/image-20250220230945704.png!compress)
+
+```c
+/*
+�������+ö��ÿһ��̨��
+for(i=0;i<1000;i++){
+		
+}
+i=0;
+while(i<1000){
+	
+	i++;
+}
+&& || !
+����ʽ1&&����ʽ2
+���Ҷ�Ϊ���Ϊ��
+��·���� ����ʽ1Ϊ�� ����ʽ2ֱ�Ӳ����� ֱ��Ϊ�� 
+*/
+
+#include <stdio.h>
+
+int main(){
+	int i;
+	for(i=0;i<1000;i++){
+		if(i%2==1 && i%3==2 && i%5==4 && i%6==5 && i%7==0){
+			printf("̨����Ϊ%d\n", i);
+			break;
+		}
+	}
+	
+	
+	
+	
+	return 0;
+}
+```
+
+### ѭ���ṹ-3
+
+![image-20250220230952843](https://yp.smallkun.cn/markdown/image-20250220230952843.png!compress)
+
+```c
+#include <stdio.h>
+/*
+����:i
+����:j
+��:k 
+*/
+
+int main(){
+	int i, j , k;
+	for(i=0;i<=33;i++){
+		for(j=0;j<=50;j++){
+			for(k=0;k<=200;k+=2){
+				if(i+j+k==100 && i*3 + j*2 + k/2 == 100){
+					printf("����:%-2d ����:%-2d ��:%-2d\n", i, j, k);
+				}
+			}
+		}
+	}
+	
+	
+	return 0;
+}
+```
+
+### ѭ���ṹ-4
+
+![image-20250220231000056](https://yp.smallkun.cn/markdown/image-20250220231000056.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	
+	int i, s, t;//i��������������, s�����洢����λ��,t�ǽ�ȡ�����λ֮����� 
+	for(i=1;i<9999;i++){
+		t = i;
+		while(t > 0){
+			s = (t/10==0?1:(t/100==0?2:(t/1000==0?3:4)));//�����������
+			t = i%(int)pow(10, s-1);//ʹ��ģ��ȥ�����λ 
+			if(t*t == i){
+				printf("%d:%d\n", t, i);
+			}
+		}
+	}
+	
+	
+	
+	return 0;
+}
+```
+
+### ѭ���ṹ-5
+
+![image-20250220231006104](https://yp.smallkun.cn/markdown/image-20250220231006104.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+/*
+	int x, n, t=1;//tΪ2��ǰ��Ҫ�����λ�� 
+	
+	scanf("%d", &x);
+	n = x;//����֮����
+	while(t < x){//�ж�λ���Ƿ񳬹������ķ�Χ 
+		n+=t*2;
+		//���ݵ�ǰ����λ���ж�ǰһλ�Ƿ�������������һ 
+		if(n/(t*10) != x/(t*10)){
+			n-=(t*10);
+		}
+		t*=10;//����������һλ 
+	}
+	printf("%d:%d\n", x, n);
+*/
+	int x, s = 0;
+	scanf("%d", &x);
+	while(x){
+		s*=10;
+		s += (x%10+2)%10;
+		x /= 10;
+	}
+	for(;s;s/=10){
+		printf("%d", s%10);
+	}
+
+	return 0;
+}
+```
+
+### ѭ���ṹ-6
+
+![image-20250220231012110](https://yp.smallkun.cn/markdown/image-20250220231012110.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	
+	int i;
+	for(i=5;i<=100;i++){
+		if(i%5==0 || i%7==0){
+			printf("%d ", i);
+		}
+	}
+
+	return 0;
+}
+```
+
+### ѭ���ṹ-7
+
+![image-20250220231022607](https://yp.smallkun.cn/markdown/image-20250220231022607.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	
+	int month, total = 2, i;
+	scanf("%d", &month);
+
+	for(i=1;i<=month;i++){
+		if(i%3==0){
+			total *= 2;
+		}
+		printf("%d��:%d����\n", i, total); 
+	}
+
+	return 0;
+}
+```
+
+### ѭ���ṹ-8
+
+![image-20250220231027969](https://yp.smallkun.cn/markdown/image-20250220231027969.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	int i, j, k;
+	
+	for(i=0;i<=3;i++){
+		for(j=1;j<=5;j++){
+			for(k=0;k<=6;k++){
+				if(i+j+k==8){
+					printf("��:%d ��:%d ��:%d\n", i, j, k);
+				}
+			}
+		}
+	}
+
+	return 0;
+}
+```
+
+### ѭ���ṹ-9
+
+![image-20250220231034218](https://yp.smallkun.cn/markdown/image-20250220231034218.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	int num, n=2, first = 1;
+	scanf("%d", &num);
+	
+	printf("%d=",num);
+	while(num > 1){
+		if(num%n==0){
+			first?printf("%d", n):printf("*%d", n);
+			first=0;
+			num/=n;
+		}else{
+			n++;
+		}
+	}
+
+	return 0;
+}
+```
+
+### ѭ���ṹ-10
+
+![image-20250220231039716](https://yp.smallkun.cn/markdown/image-20250220231039716.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	int x;
+	while(1){
+		scanf("%d", &x);
+		if(x == 0){
+			break;
+		}
+		printf("%d:%s\n", x, (x%5==0&&x%7==0?"Yes":"No"));
+	}
+
+	return 0;
+}
+```
+
+---
+
+## ����
+
+### ����-1
+
+![image-20250220231426147](https://yp.smallkun.cn/markdown/image-20250220231426147.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	int num[30], i, j;
+	float result[6];
+	for(i=0;i<30;i++){
+		num[i] = 2+2*i;
+	}
+	
+	for(i=0;i<30;i+=5){
+		result[i/5] = (num[i]+ num[i+1] + num[i+2] + num[i+3] + num[i+4])/5.0;
+	}
+	
+	for(i=0;i<6;i++){
+		printf("%.2f ", result[i]);
+	}
+	printf("\n");
+
+	return 0;
+}
+
+```
+
+### ����-2
+
+![image-20250220231434409](https://yp.smallkun.cn/markdown/image-20250220231434409.png!compress)
+
+```c
+#include <stdio.h>
+
+int fib(int n){
+	if(n== 0 || n==1){
+		return 1;
+	}
+	return fib(n-1) + fib(n-2);
+}
+
+int main(){
+	int num[15], i;
+	
+	for(i=0;i<15;i++){
+		num[i] = fib(i);
+	}
+	
+	for(i=0;i<15;i++){
+		printf("%d ", num[i]);
+	}
+	printf("\n");
+	
+	return 0;
+}
+
+/*
+int main(){
+	int num[15] = {1, 1}, i;
+
+	for(i=2;i<15;i++){
+		num[i] = num[i-1] + num[i-2];
+	}
+	for(i=0;i<15;i++){
+		printf("%d ", num[i]);
+	}
+	printf("\n");
+
+	return 0;
+}
+*/
+```
+
+### ����-3
+
+![image-20250220231441384](https://yp.smallkun.cn/markdown/image-20250220231441384.png!compress)
+
+```c
+#include <stdio.h>
+#include <string.h>
+
+int main(){
+	char a[200], b[200];//���������ַ�����������ȡ�ַ���a��b 
+	char *p, *q;//��������ָ�� �ֱ�洢�ַ���a���ַ���b���׵�ַ 
+	
+	gets(a);
+	gets(b);//�ӿ���̨��ȡ���� 
+	if(strlen(b) > 5){
+		b[5] = '\0';
+	}//�ж��ַ����Ƿ����5 �������5 �򽫵�����Ԫ�ظijɽ����� 
+	p = a;//pָ��a���׵�ַ 
+	q = b;//qָ��b���׵�ַ 
+	while(*p != '\0'){//�ҵ�a������λ�õĵ�ַ 
+		p++;
+	}
+	//��b�ĵ�һ��Ԫ�ؿ�ʼ��ֵ��a�� 
+	while(*q != '\0'){
+		*p++ = *q++;
+	}
+	*p = '\0';//��ǽ����� 
+	printf("a=%s\n", a);
+	printf("b=%s\n", b);
+	
+	
+	return 0;
+}
+```
+
+### ����-4
+
+![image-20250220231447834](https://yp.smallkun.cn/markdown/image-20250220231447834.png!compress)
+
+```c
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+
+int main(){
+	int num[10], i;
+	srand((unsigned)time(NULL));
+	
+	for(i=0;i<10;i++){
+		num[i] = rand()%101;
+		printf("%d ", num[i]);
+	}
+	printf("\n");
+
+	return 0;
+}
+
+```
+
+### ����-5
+
+![image-20250220231704799](https://yp.smallkun.cn/markdown/image-20250220231704799.png!compress)
+
+```c
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+#include <limits.h> //���涨���˻����������͵����ֵ����Сֵ 
+
+int main(){
+	int num[3][4], i, j, min=INT_MAX, i_index, j_index;
+	srand((unsigned)time(NULL));
+	
+	for(i=0;i<3;i++){
+		for(j=0;j<4;j++){
+			num[i][j] = rand()%101;
+			printf("%2d ", num[i][j]);
+			if(num[i][j] < min){
+				min = num[i][j];
+				i_index = i;
+				j_index = j;
+			}
+		}
+		printf("\n");
+	}
+	printf("min=%d i=%d j=%d\n", min, i_index, j_index);
+	return 0;
+}
+
+```
+
+---
+
+## ����
+
+### ����-1
+
+![image-20250227231121624](https://yp.smallkun.cn/markdown/image-20250227231121624.png!compress)
+
+```c
+#include <stdio.h>
+#include <math.h>
+#include <stdlib.h>
+
+/*
+1 	2 	3 |6
+4 	5 	6 |15
+7 	8 	9 |24
+-------------
+12 15 	18 
+*/
+void getSum(int array[100][100], int n, int m){
+	int i, j, sum;
+	for(i=0;i<n;i++){
+		sum = 0;
+		for(j=0;j<m;j++){
+			printf("%-5d ", array[i][j]);
+			sum += array[i][j];
+		}
+		printf("| %-5d\n", sum);
+	}
+	for(j=0;j<m;j++){
+		printf("------");
+	}
+	printf("\n");
+	for(j=0;j<m;j++){//�е��±�
+		sum =0;
+		for(i=0;i<n;i++){//�е��±� 
+			sum += array[i][j];	
+		}
+		printf("%-5d ", sum);
+	}
+	printf("\n");
+}
+
+int main(){
+	int n, m, i, j;//n���� m����
+	int array[100][100] = {0};
+	
+	printf("����������������:");
+	scanf("%d %d", &n, &m);
+	
+	srand((unsigned)time(NULL));
+	
+	for(i=0;i<n;i++){
+		for(j=0;j<m;j++){
+			array[i][j] = rand()%100;
+		}
+	}
+	getSum(array, n, m);
+
+	return 0;
+}
+
+```
+
+
+
+### ����-2
+
+![image-20250227231147113](https://yp.smallkun.cn/markdown/image-20250227231147113.png!compress)
+
+```c
+#include <stdio.h>
+
+void change(char *p){
+	//alex apple 
+	*p++ -= 32;//a-> -32 ->A
+	while(*p != '#'){
+		if(*(p-1) == ' '){
+			*p -= 32;
+		}
+		p++;
+	}
+	*p = '\0';
+}
+
+int main(){
+	char str[1024];
+	
+	gets(str);//��ȡһ���ַ��� �س��ж����� 
+	change(str);
+	puts(str);
+	
+
+	return 0;
+}
+
+```
+
+
+
+### ����-3
+
+![image-20250227231154429](https://yp.smallkun.cn/markdown/image-20250227231154429.png!compress)
+
+```c
+#include <stdio.h>
+
+//�ݴη� 
+int power(int n){
+	int s = 1, i;
+	for(i=1;i<=n;i++){
+		s *= 2;
+	}
+	return s;
+}
+//�׳� 
+int factorial(int n){
+	int s = 1, i;
+	for(i=1;i<=n;i++){//1~n
+		s*=i;
+	}
+	return s;
+}
+
+int main(){
+	int n, i, s = 0;
+	scanf("%d", &n);
+	for(i=1;i<=n;i++){
+		s += power(i) * factorial(i);
+	}
+	printf("%d\n", s);
+
+	return 0;
+}
+
+```
+
+
+
+## ָ��
+
+### ָ��-1
+
+![image-20250227231209008](https://yp.smallkun.cn/markdown/image-20250227231209008.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	int a[10], b[10];
+	int i;
+	int *p, *q;
+	
+	for(i=0, p=a;i<10;i++){
+		scanf("%d", p++);
+	}
+	for(i=0, p=a, q=b;i<10;i++){
+		if(*p%2==0){
+			*q++=*p;
+		}
+		p++;
+	}
+	for(i=0, p=b;i<q-b;i++){
+		printf("%d ", *p++);
+	}
+	printf("\n");
+	
+
+	return 0;
+}
+
+```
+
+
+
+### ָ��-2
+
+![image-20250227231216409](https://yp.smallkun.cn/markdown/image-20250227231216409.png!compress)
+
+```c
+#include <stdio.h>
+/*
+1 2 3 4 5 6 7 8 9 10
+1 3 4 5 6 7 8 9 10
+*/
+int main(){
+	int a[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
+	int n = 10;
+	int i;
+	int *p, *q;
+	p = a+1;
+	q = a+2;
+	for(i=0;i<8;i++){//��������ѭ���Ĵ��� 
+		*p++ = *q++;
+	}
+	n--;
+	for(i=0;i<n;i++){
+		printf("%d ", *(a+i));
+	}
+	printf("\n");
+	return 0;
+}
+
+```
+
+
+
+### ָ��-3
+
+![image-20250227231232971](https://yp.smallkun.cn/markdown/image-20250227231232971.png!compress)
+
+```c
+#include <stdio.h>
+
+int main(){
+	char str[] = "AbcDEfg";
+	char *p = str;
+	
+	while(*p != '\0'){
+		if(*p >= 'a' && *p <= 'z'){
+			*p -= 32;
+		}else{
+			*p += 32;
+		}
+		p++;
+	}
+	puts(str);
+
+	return 0;
+}
+
+```
+
+
+
+### ָ��-4
+
+![image-20250227231243197](https://yp.smallkun.cn/markdown/image-20250227231243197.png!compress)
+
+```c
+#include <stdio.h>
+#include <string.h>
+
+int main(){
+	char str[5][20];
+	char (*p)[20], (*max)[20];//�������� (*������)[����];����ָ�� 
+	int i;
+	for(i=0, p =str;i<5;i++){
+		scanf("%s", p++);
+	}
+	max = p;
+	
+	for(i=1, p =str+1;i<5;i++){
+		if(strcmp(*p, *max)){
+			max = p;
+		}
+		p++;
+	}
+	printf("max = %s\n", max);
+
+	return 0;
+}
+
+```
+
+
+
+## ����Ԥ����
+
+### Ԥ����-1
+
+![image-20250227231302316](https://yp.smallkun.cn/markdown/image-20250227231302316.png!compress)
+
+```c
+#include <stdio.h>
+#define MAXD(x, y) (x>y?x:y)
+
+int main(){
+    int a, b;
+    scanf("%d %d", &a, &b);
+    //(1>2?1:2) ��MAXD�滻����Ŀ�����
+    printf("%d \n", MAXD(a, b));
+
+    return 0;
+}
+```
+
+### Ԥ����-2
+
+![image-20250227231314793](https://yp.smallkun.cn/markdown/image-20250227231314793.png!compress)
+```c
+#include <stdio.h>
+#define f(n) (n%5==0 && n%7==0?"�ܱ�����\n":"���ܱ�����\n")
+int main(){
+    //#define ָ�� ������� ������������н����в����滻�ɴ����
+    int num;
+    scanf("%d", &num);
+
+    puts(f(num));
+
+    return 0;
+}
+```
+
+
+### Ԥ����-3
+
+![image-20250227231325297](https://yp.smallkun.cn/markdown/image-20250227231325297.png!compress)
+
+```c
+#include <stdio.h>
+
+#define CHANGE 0 //1������ӡ���� 0����
+//! Ctrl + .ע��
+int main(){
+    char str[100], i=0;
+    scanf("%s", str);
+#if CHANGE
+    while(str[i] != '\0'){
+        if(str[i] >= 'a' && str[i] <= 'y' || str[i] >= 'A' && str[i] <= 'Y' ){
+            str[i]++;
+        }else if(str[i] == 'z' || str[i] == 'Z'){
+            str[i]-=25;
+        }
+        i++;
+    }
+#endif
+    puts(str);
+
+    return 0;
+}
+```
+
+## �ṹ��
+
+### �ṹ��-1
+
+![image-20250227231339018](https://yp.smallkun.cn/markdown/image-20250227231339018.png!compress)
+```c
+#include <stdio.h>
+
+typedef struct student{
+    int num;
+    char name[20];
+    float socre[3];
+}student;
+//student ��Ϊһ������
+//�����дtypedef��ṹ������Ϊ struct student
+
+void output(student stuList[5]){
+    int i;
+
+    for(i=0;i<5;i++){
+        printf("%d\t%s\t%f\t%f\t%f\n", stuList[i].num, stuList[i].name, stuList[i].socre[0], 
+                                stuList[i].socre[1], stuList[i].socre[2]);
+    }
+}
+int main(){
+    student stuList[5];//������һ���ṹ�����������������5���ṹ�����
+    int i;
+    for(i=0;i<5;i++){
+        scanf("%d %s %f %f %f", &stuList[i].num, stuList[i].name, &stuList[i].socre[0], 
+                                &stuList[i].socre[1], &stuList[i].socre[2]);
+    }
+    output(stuList);
+    return 0;
+}
+```
+
+
+### �ṹ��-2
+
+![image-20250227231421233](https://yp.smallkun.cn/markdown/image-20250227231421233.png!compress)
+
+```c
+#include <stdio.h>
+
+typedef struct student{
+    int num;
+    char name[20];
+    float socre[3];
+}student;
+//student ��Ϊһ������
+//�����дtypedef��ṹ������Ϊ struct student
+
+void output(student stuList[5]){
+    int i;
+
+    for(i=0;i<5;i++){
+        printf("%d\t%s\t%f\t%f\t%f\n", stuList[i].num, stuList[i].name, stuList[i].socre[0], 
+                                stuList[i].socre[1], stuList[i].socre[2]);
+    }
+}
+
+void input(student stuList[5]){
+    int i;
+    for(i=0;i<5;i++){
+        scanf("%d %s %f %f %f", &stuList[i].num, stuList[i].name, &stuList[i].socre[0], 
+                                &stuList[i].socre[1], &stuList[i].socre[2]);
+    }
+}
+int main(){
+    student stuList[5];//������һ���ṹ�����������������5���ṹ�����
+
+    input(stuList);
+    output(stuList);
+    return 0;
+}
+```
+
+### �ṹ��-3
+
+![image-20250227231434183](https://yp.smallkun.cn/markdown/image-20250227231434183.png!compress)
+```c
+#include <stdio.h>
+typedef struct score{
+    float medScore;
+    float endScore;
+}score;
+
+int main(){
+    score s;
+    scanf("%f %f", &s.medScore, &s.endScore);
+
+    printf("avg=%.2f\n", (s.medScore + s.endScore)/2);
+    return 0;
+}
+```
+
+
+## �ļ�
+
+### �ļ�-1
+
+![image-20250227231459946](https://yp.smallkun.cn/markdown/image-20250227231459946.png!compress)
+
+
+
+
+
+### �ļ�-2
+
+![image-20250227231509693](https://yp.smallkun.cn/markdown/image-20250227231509693.png!compress)
+
+
+
+### �ļ�-3
+
+![image-20250227231516025](https://yp.smallkun.cn/markdown/image-20250227231516025.png!compress)
+
+
+
diff --git a/最后两周/C语言基础进阶合集版编程题.md b/最后两周/C语言基础进阶合集版编程题.md
new file mode 100644
index 0000000..e69de29
diff --git a/最后两周/C语言基础进阶合集版编程题.pdf b/最后两周/C语言基础进阶合集版编程题.pdf
new file mode 100644
index 0000000..c734591
Binary files /dev/null and b/最后两周/C语言基础进阶合集版编程题.pdf differ
diff --git a/最后两周/MySQL数据库操作综合练习题答案.md b/最后两周/MySQL数据库操作综合练习题答案.md
new file mode 100644
index 0000000..4a69594
--- /dev/null
+++ b/最后两周/MySQL数据库操作综合练习题答案.md
@@ -0,0 +1,651 @@
+### 练习一
+
+![image-20250315225248590](https://yp.smallkun.cn/markdown/image-20250315225248590.png!compress)
+
+```sql
+#(1)创建数据库
+CREATE DATABASE test04_Market DEFAULT CHARACTER SET utf8;
+USE test04_Market;
+#(2)创建数据表
+CREATE TABLE customers(
+	c_num INT(11) PRIMARY KEY	AUTO_INCREMENT,
+	c_name VARCHAR(50),
+	c_contact VARCHAR(50),
+	c_city VARCHAR(50),
+	c_birth DATETIME NOT NULL
+);
+#(3)更改字段的位置
+#AFTER/BEFORE 字段名 设置位置在指定字段前/后
+ALTER TABLE 表名 MODIFY 字段名 数据类型 AFTER/BEFORE 字段名;
+ALTER TABLE customers MODIFY c_contact VARCHAR(50) AFTER c_birth;
+#(4)更改字段的数据类型
+ALTER TABLE customers MODIFY c_name VARCHAR(70);
+#(5)更改字段名
+ALTER TABLE customers CHANGE c_contact c_phone VARCHAR(50);
+#(6)添加字段
+ALTER TABLE customers ADD c_gender CHAR(1);
+#(7)更改表名
+ALTER TABLE customers RENAME TO customers_info;
+#(8)删除字段
+ALTER TABLE customers_info DROP c_city;
+```
+
+![image-20250315225304324](https://yp.smallkun.cn/markdown/image-20250315225304324.png!compress)
+
+```sql
+#(1)创建表时 添加外键约束并指定外键约束名称
+CREATE TABLE orders(
+	o_num INT(11) PRIMARY KEY AUTO_INCREMENT,
+	o_date DATE,
+	c_id INT(11),
+	CONSTRAINT fk_cid FOREIGN KEY(c_id) REFERENCES customers_info(c_num)
+);
+#(2)
+#删除指定外键
+ALTER TABLE orders DROP FOREIGN KEY orders_ibfk_1;
+#删除指定表
+DROP TABLE orders;
+```
+
+---
+
+### 练习二
+
+![image-20250315225318753](https://yp.smallkun.cn/markdown/image-20250315225318753.png!compress)
+
+![image-20250315225328264](https://yp.smallkun.cn/markdown/image-20250315225328264.png!compress)
+
+```sql
+#(1)创建表、插入记录
+CREATE TABLE pet(
+	`name` VARCHAR(20) NOT NULL COMMENT '宠物名称',
+	`owner` VARCHAR(20) COMMENT '宠物主人',
+	species VARCHAR(20) NOT NULL COMMENT '种类',
+	sex CHAR(1) NOT NULL COMMENT '性别',
+	birth YEAR NOT NULL COMMENT '出生日期',
+	death YEAR COMMENT '死亡日期'
+);
+INSERT INTO pet()
+VALUES
+('Fluffy', 'Harold', 'cat', 'f', 2003, 2010),
+('Claws', 'Gwen', 'cat', 'm', 2004,NULL ),
+('Buffy', NULL, 'dog', 'f', 2009, NULL),
+('Fang', 'Benny', 'dog', 'm', 2000, NULL),
+('Bowser', 'Diane', 'dog', 'm', 2003, 2009),
+('Chirpy', NULL, 'bird', 'f', 2008, NULL);
+#(2)更新记录
+UPDATE pet
+SET `owner` = 'Kevin'
+WHERE `name` = 'Fang';
+#(3)
+UPDATE pet
+SET `owner` = 'Kevin'
+WHERE `owner` IS NULL;
+#(4)
+DELETE FROM pet
+WHERE death IS NOT NULL;
+#(5)
+TRUNCATE pet;
+```
+
+---
+
+### 练习三
+
+![image-20250315225417117](https://yp.smallkun.cn/markdown/image-20250315225417117.png!compress)
+
+![image-20250315225431297](https://yp.smallkun.cn/markdown/image-20250315225431297.png!compress)
+
+```sql
+#1.创建数据库
+CREATE DATABASE test_compay DEFAULT CHARACTER SET utf8;
+
+#2.创建表
+CREATE TABLE department(
+	depid INT PRIMARY KEY AUTO_INCREMENT,
+	depname VARCHAR(20) NOT NULL,
+	deinfo VARCHAR(50)
+);
+CREATE TABLE employee(
+	empid INT PRIMARY KEY AUTO_INCREMENT,
+	`name` VARCHAR(20) NOT NULL,
+	sex CHAR(1) NOT NULL DEFAULT '男',
+	title VARCHAR(20) NOT NULL,
+	birthday DATE NOT NULL,
+	depid INT,
+	CONSTRAINT fk_eid_did FOREIGN KEY(depid) REFERENCES department(depid)
+);
+CREATE TABLE salary(
+	empid INT,
+	basesalary DECIMAL(10, 2),
+	titleSalary DECIMAL(10, 2),
+	decuction DECIMAL(10, 2)
+);
+#3添加外键并设置级联更新、级联删除
+ALTER TABLE salary ADD CONSTRAINT fk_sal_eid FOREIGN KEY(empid) 
+REFERENCES employee(empid) ON UPDATE CASCADE ON DELETE CASCADE;
+#4插入记录
+INSERT INTO department (depid, depname, deinfo)
+VALUES
+(111, '生产部', NULL),
+(222, '销售部', NULL),
+(333, '人事部', NULL),
+(444, '财务部', '负责公司财务管理'),
+(555, '技术部', '负责技术研发与支持'),
+(666, '市场部', '负责市场推广与品牌建设'),
+(777, '客服部', '负责客户服务与支持'),
+(888, '采购部', '负责公司物资采购'),
+(999, '法务部', '负责公司法律事务'),
+(1010, '行政部', '负责公司日常行政管理'),
+(1011, '研发部', '负责新产品研发'),
+(1012, '培训部', '负责员工培训与发展');
+
+INSERT INTO employee (empid, name, sex, title, birthday, depid)
+VALUES
+(1001, '张三', '男', '高级工程师', '1975-1-1', 111),
+(1002, '李四', '女', '助工', '1985-1-1', 111),
+(1003, '王五', '男', '工程师', '1978-11-11', 222),
+(1004, '赵六', '男', '工程师', '1999-1-1', 222),
+(1005, '陈七', '女', '会计师', '1980-5-15', 444),
+(1006, '刘八', '男', '软件工程师', '1990-8-20', 555),
+(1007, '孙九', '女', '市场经理', '1985-12-25', 666),
+(1008, '周十', '男', '客服专员', '1992-3-10', 777),
+(1009, '吴十一', '女', '采购经理', '1988-7-22', 888),
+(1010, '郑十二', '男', '法务顾问', '1983-9-30', 999),
+(1011, '王十三', '女', '行政助理', '1995-4-18', 1010),
+(1012, '李十四', '男', '研发工程师', '1991-11-5', 1011),
+(1013, '赵十五', '女', '培训讲师', '1987-6-12', 1012),
+(1014, '孙十六', '男', '技术支持', '1993-2-14', 555),
+(1015, '杨十七', '女', '销售代表', '1994-8-8', 222);
+
+INSERT INTO salary (empid, basesalary, titleSalary, decuction)
+VALUES
+(1001, 2200, 1100, 200),
+(1002, 1200, 200, NULL),
+(1003, 2900, 700, 200),
+(1004, 1950, 700, 150),
+(1005, 2500, 800, 100),
+(1006, 3000, 1200, 250),
+(1007, 2800, 1000, 200),
+(1008, 1800, 300, 50),
+(1009, 3200, 900, 300),
+(1010, 3500, 1000, 400),
+(1011, 2000, 400, 100),
+(1012, 3100, 1100, 200),
+(1013, 2700, 800, 150),
+(1014, 2300, 700, 100),
+(1015, 2600, 600, 200);
+```
+
+![image-20250315225441802](https://yp.smallkun.cn/markdown/image-20250315225441802.png!compress)
+
+```sql
+#5
+SELECT e.empid, e.`name`, e.title, d.depname, s.basesalary + s.titleSalary, s.basesalary + s.titleSalary-IFNULL(s.decuction, 0)
+FROM employee e, department d, salary s
+WHERE e.depid = d.depid AND e.empid = s.empid;
+#6
+SELECT e.`name`, s.basesalary
+FROM employee e, department d, salary s
+WHERE e.depid = d.depid AND e.empid = s.empid AND d.depname = '销售部';
+#7
+SELECT *
+FROM employee e
+WHERe e.`name` LIKE '张%' AND TIMESTAMPDIFF(YEAR,e.birthday, NOW()) < 40;
+#8
+SELECT e.`name`, s.basesalary, s.titleSalary
+FROM employee e, salary s
+WHERE e.sex = '男' AND e.empid AND s.empid;
+#9
+SELECT e.`name`, e.title, d.depname
+FROM employee e, department d, salary s
+WHERE e.depid = d.depid AND e.empid = s.empid AND s.basesalary < 2000;
+#10
+SELECT COUNT(*)
+FROM employee;
+#11
+SELECT COUNT(*)
+FROM department d;
+#12
+SELECT AVG(s.basesalary + s.titleSalary), MAX(s.basesalary + s.titleSalary), MIN(s.basesalary + s.titleSalary)
+FROM employee e, salary s
+WHERE e.empid = s.empid;
+#13
+SELECT d.depname, AVG(s.basesalary + s.titleSalary)
+FROM employee e, salary s, department d
+WHERE e.empid = s.empid AND e.depid = d.depid
+GROUP BY d.depid;
+#14
+SELECT d.depname, AVG(s.basesalary + s.titleSalary) avg
+FROM employee e, salary s, department d
+WHERE e.empid = s.empid AND e.depid = d.depid
+GROUP BY d.depid
+HAVING avg<2000;
+#15
+SELECT e.empid, e.`name`, s.basesalary, s.titleSalary, s.decuction
+FROM employee e, salary s, department d
+WHERE e.empid = s.empid AND e.depid = d.depid
+ORDER BY s.titleSalary, s.basesalary;
+#16
+SELECT e.empid, e.`name`, e.birthday, 
+	IF(YEAR(e.birthday) < 1980, '老年', 
+	IF(YEAR(e.birthday)< 1990, '中年', '青壮年'))
+FROM employee e;
+#17
+SELECT e.*, depname
+FROM employee e, department d
+WHERE e.depid = d.depid;
+#18
+SELECT d.*, e.*
+FROM employee e, department d
+WHERE e.depid = d.depid;
+#19
+SELECT *
+FROM employee e
+WHERE e.title LIKE '%工程师%' AND e.sex = '男';
+#20
+SELECT d.depname, e.sex, COUNT(*), AVG(s.basesalary)
+FROM employee e, department d, salary s
+WHERE e.depid = d.depid AND e.empid = s.empid
+GROUP BY d.depid, e.sex;
+```
+
+
+
+---
+
+### 练习四
+
+![image-20250315225803115](https://yp.smallkun.cn/markdown/image-20250315225803115.png!compress)
+
+![image-20250315225818026](https://yp.smallkun.cn/markdown/image-20250315225818026.png!compress)
+
+```sql
+#1
+CREATE DATABASE test_school DEFAULT CHARACTER SET 'UTF8';
+#2
+DROP TABLE department;
+CREATE TABLE department(
+	depNo INT(10) PRIMARY KEY COMMENT '部门号',
+	depName VARCHAR(50) NOT NULL COMMENT '部门名称',
+	depNote VARCHAR(20) COMMENT '部门备注'
+);
+CREATE TABLE teacher(
+	number INT PRIMARY KEY COMMENT '教工号',
+	`name` VARCHAR(30) NOT NULL COMMENT '姓名',
+	sex VARCHAR(4) COMMENT '性别',
+	birth DATE COMMENT '出生日期',
+	depNo INT COMMENT '部门号',
+	salary FLOAT COMMENT '工资',
+	address VARCHAR(100) COMMENT '家庭住址'
+);
+INSERT INTO department()
+VALUES
+(601, '软件技术系', '软件技术等专业'),
+(602, '网络技术系', '多媒体技术等专业'),
+(603, '艺术设计系', '广告艺术设计等专业'),
+(604, '管理工程系', '连锁经营管理等专业');
+
+INSERT INTO teacher()
+VALUES
+(2001, 'Tom', '女', '1970-01-10', 602, 4500, '四川省绵阳市'),
+(2002, 'Lucy', '男', '1983-12-18', 601, 2500, '北京市昌平区'),
+(2003, 'Mike', '男', '1990-06-01', 604, 1500, '重庆市渝中区'),
+(2004, 'James', '女', '1980-10-20', 602, 3500, '四川省成都市'),
+(2005, 'Jack', '男', '1975-05-30', 603, 1200, '重庆市南岸区');
+```
+
+![image-20250315225829272](https://yp.smallkun.cn/markdown/image-20250315225829272.png!compress)
+
+```sql
+#4
+SELECT *
+FROM teacher;
+#5
+SELECT t.number '教工号', d.depName '部门名称'
+FROM teacher t, department d
+WHERE t.depNo = d.depNo AND t.address LIKE '%北京%';
+#6
+SELECT t.number, t.`name`
+FROM teacher t
+ORDER BY t.salary DESC
+LIMIT 1;
+#7
+SELECT t.number, t.`name`
+FROM teacher t
+WHERE t.salary BETWEEN 2500 AND 4000;
+#8
+SELECT t.`name`, t.sex, t.salary
+FROM teacher t, department d
+WHERE t.depNo = d.depNo AND d.depName = '网络技术系';
+```
+
+---
+
+### 练习五
+
+![image-20250315230015174](https://yp.smallkun.cn/markdown/image-20250315230015174.png!compress)
+
+```sql
+-- 创建数据库并设置字符集为 utf8mb4
+CREATE DATABASE test_student CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+USE test_student;
+
+-- 创建表 Classes
+CREATE TABLE Classes (
+    专业 VARCHAR(50),
+    班级 VARCHAR(50),
+    姓名 VARCHAR(50),
+    性别 VARCHAR(10),
+    座位 INT
+);
+
+-- 向表 Classes 插入数据
+INSERT INTO Classes (专业, 班级, 姓名, 性别, 座位) VALUES
+('计算机网络', '1班', '张三', '男', 8),
+('软件工程', '2班', '李四', '男', 12),
+('计算机维护', '1班', '王五', '男', 9),
+('计算机网络', '2班', 'LILY', '女', 15),
+('软件工程', '1班', '小强', '男', 20),
+('计算机维护', '1班', 'CoCo', '女', 18);
+
+-- 创建表 Score
+CREATE TABLE Score (
+    姓名 VARCHAR(50),
+    英语 INT,
+    数学 INT,
+    语文 INT
+);
+
+-- 向表 Score 插入数据
+INSERT INTO Score (姓名, 英语, 数学, 语文) VALUES
+('张三', 65, 75, 98),
+('李四', 87, 45, 86),
+('王五', 98, 85, 65),
+('LILY', 75, 86, 87),
+('小强', 85, 60, 58),
+('CoCo', 96, 87, 70);
+
+-- 创建表 Records
+CREATE TABLE Records (
+    姓名 VARCHAR(50),
+    记录 VARCHAR(50)
+);
+
+-- 向表 Records 插入数据
+INSERT INTO Records (姓名, 记录) VALUES
+('小强', '迟到'),
+('小强', '事假'),
+('李四', '旷课'),
+('李四', '旷课'),
+('李四', '迟到'),
+('CoCo', '病假'),
+('LILY', '事假');
+```
+
+![image-20250315230025538](https://yp.smallkun.cn/markdown/image-20250315230025538.png!compress)
+
+```sql
+#3
+UPDATE score s
+SET s.`语文` = 88
+WHERE s.`姓名` = '张三';
+
+#4
+SELECT AVG(s.`英语`), AVG(s.`数学`), AVG(s.`语文`)
+FROM classes c, score s
+WHERE c.`姓名` = s.`姓名` AND c.`班级` = 1 AND c.`专业` = '计算机维护';
+
+#5
+SELECT *
+FROM score s
+WHERE s.`数学` < 60 OR s.`英语` < 60 OR s.`语文` < 60;
+
+#6
+SELECT *
+FROM score s
+WHERE s.`姓名` IN (
+	SELECT r.`姓名`
+	FROM records r
+	GROUP BY r.`姓名`
+	HAVING COUNT(*) > 2
+);
+```
+
+---
+
+### 练习六
+
+![image-20250315230057816](https://yp.smallkun.cn/markdown/image-20250315230057816.png!compress)
+
+```sql
+-- 创建数据库 test_xuankedb 并设置字符集为 utf8mb4
+CREATE DATABASE test_xuankedb CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+USE test_xuankedb;
+
+-- 创建学生表 Student
+CREATE TABLE Student (
+    Sn0 VARCHAR(20) PRIMARY KEY,  -- 学号，主键
+    Sname VARCHAR(50),            -- 姓名
+    Ssex VARCHAR(10),             -- 性别
+    Sage INT,                     -- 年龄
+    Sdept VARCHAR(50)             -- 所在系
+);
+
+-- 创建课程表 Course
+CREATE TABLE Course (
+    Cn0 VARCHAR(20) PRIMARY KEY,  -- 课程号，主键
+    Cname VARCHAR(100),           -- 课程名
+    Cpn0 VARCHAR(20),             -- 选修课号
+    Ccredit INT                   -- 学分
+);
+
+-- 创建成绩表 SG
+CREATE TABLE SG (
+    Sn0 VARCHAR(20),              -- 学号
+    Cn0 VARCHAR(20),              -- 课程号
+    Grade INT,                    -- 成绩
+    PRIMARY KEY (Sn0, Cn0),       -- 复合主键 (学号, 课程号)
+    FOREIGN KEY (Sn0) REFERENCES Student(Sn0),  -- 外键，引用 Student 表
+    FOREIGN KEY (Cn0) REFERENCES Course(Cn0)    -- 外键，引用 Course 表
+);
+
+INSERT INTO Student (Sno, Sname, Ssex, Sage, Sdept, Scome) VALUES
+('05001', '张三', '男', 20, '计算机系', '2021-09-01'),
+('05002', '李四', '女', 21, '数学系', '2021-09-01'),
+('05003', '王五', '男', 22, '计算机系', '2021-09-01'),
+('05004', '李洋', '男', 19, '物理系', '2021-09-01'),
+('05019', '赵六', '女', 20, '计算机系', '2021-09-01');
+
+INSERT INTO Course (Cno, Cname, Cpno, Ccredit) VALUES
+('1', '数据库', NULL, 4),
+('2', '数学', NULL, 3),
+('3', '物理', NULL, 3),
+('4', '操作系统', '1', 4);
+
+INSERT INTO SG (Sno, Cno, Grade) VALUES
+('05001', '1', 85),
+('05001', '2', 90),
+('05002', '1', 78),
+('05002', '3', 88),
+('05003', '1', 92),
+('05003', '4', 76),
+('05004', '3', 95),
+('05019', '1', 80),
+('05019', '4', 85);
+```
+
+---
+
+### 练习七
+
+![image-20250315230113710](https://yp.smallkun.cn/markdown/image-20250315230113710.png!compress)
+
+![image-20250315230128412](https://yp.smallkun.cn/markdown/image-20250315230128412.png!compress)
+
+```sql
+-- 创建数据库 test_library 并设置字符集为 utf8mb4
+CREATE DATABASE test_library CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+USE test_library;
+
+-- 创建表 press（出版社）
+CREATE TABLE press (
+    pressid INT PRIMARY KEY,  -- 出版社编号，主键
+    pressname VARCHAR(100),   -- 出版社名称
+    address VARCHAR(100)      -- 出版社地址
+);
+
+-- 创建表 sort（种类）
+CREATE TABLE sort (
+    sortno INT PRIMARY KEY,   -- 种类编号，主键
+    scount INT,               -- 数量
+    describes VARCHAR(100)    -- 描述
+);
+
+-- 创建表 book（图书）
+CREATE TABLE book (
+    bid INT PRIMARY KEY,      -- 图书编号，主键
+    bname VARCHAR(100),      -- 图书名称
+    bsortno INT,             -- 种类编号
+    pressid INT,             -- 出版社编号
+    FOREIGN KEY (bsortno) REFERENCES sort(sortno),  -- 外键，引用 sort 表
+    FOREIGN KEY (pressid) REFERENCES press(pressid) -- 外键，引用 press 表
+);
+
+-- 向 press 表插入数据
+INSERT INTO press (pressid, pressname, address) VALUES
+(100, '外研社', '上海'),
+(101, '北大出版社', '北京'),
+(102, '教育出版社', '北京');
+
+-- 向 sort 表插入数据
+INSERT INTO sort (sortno, scount, describes) VALUES
+(11, 50, '小说'),
+(12, 100, '科幻'),
+(13, 100, '神话');
+
+-- 向 book 表插入数据
+INSERT INTO book (bid, bname, bsortno, pressid) VALUES
+(1, '红与黑', 11, 100),
+(2, '幻城', 12, 102),
+(3, '希腊神话', 13, 102);
+
+#5
+SELECT b.*
+FROM book b, press p
+WHERE p.pressid = b.pressid AND p.pressid = 100;
+
+#6
+SELECT b.*
+FROM book b, press p
+WHERE p.pressid = b.pressid AND p.pressname = '外研社';
+
+#7
+SELECT *
+FROM sort s
+WHERE s.scount > 100;
+
+#8
+SELECT p.*
+FROM book b, press p
+WHERE p.pressid = b.pressid
+GROUP BY b.pressid
+HAVING COUNT(*) = (
+	SELECT COUNT(*)
+	FROM book b, press p
+	WHERE p.pressid = b.pressid
+	GROUP BY b.pressid
+	ORDER BY COUNT(*) DESC
+	LIMIT 1
+);
+```
+
+---
+
+### 练习八
+
+![image-20250315230214156](https://yp.smallkun.cn/markdown/image-20250315230214156.png!compress)
+
+![image-20250315230227129](https://yp.smallkun.cn/markdown/image-20250315230227129.png!compress)
+
+```sql
+-- 创建数据库 test_tour 并设置字符集为 utf8mb4
+CREATE DATABASE test_tour CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+USE test_tour;
+
+-- 创建表 agency（旅行社表）
+CREATE TABLE agency (
+    id INT PRIMARY KEY,        -- 旅行社编号，主键
+    name VARCHAR(100) NOT NULL, -- 旅行社名
+    address VARCHAR(100) NOT NULL, -- 旅行社地址
+    areaid INT                -- 所属区域编号
+);
+
+-- 创建表 travel（旅行线路表）
+CREATE TABLE travel (
+    tid INT PRIMARY KEY,      -- 旅行线路编号，主键
+    time VARCHAR(50) NOT NULL, -- 所需时间
+    position VARCHAR(100) NOT NULL, -- 目的地
+    money FLOAT,              -- 花费
+    aid INT NOT NULL,         -- 所属旅行社编号
+    count INT,                -- 报名人数
+    FOREIGN KEY (aid) REFERENCES agency(id) -- 外键，引用 agency 表
+);
+
+-- 向 agency 表插入数据
+INSERT INTO agency (id, name, address) VALUES
+(101, '青年旅行社', '北京海淀'),
+(102, '天天旅行社', '天津海院');
+
+-- 向 travel 表插入数据
+INSERT INTO travel (tid, time, position, money, aid, count) VALUES
+(1, '5天', '八达岭', 3000, 101, 10),
+(2, '7天', '水长城', 5000, 101, 14),
+(3, '8天', '水长城', 6000, 102, 11);
+
+#4
+SELECT a.*
+FROM travel t, agency a
+WHERE t.aid =a.id
+GROUP BY a.id
+HAVING COUNT(*) = (
+	SELECT COUNT(*)
+	FROM travel t, agency a
+	WHERE t.aid =a.id
+	GROUP BY a.id
+	ORDER BY COUNT(*) DESC
+	LIMIT 1
+);
+
+#5
+SELECT t.*
+FROM travel t
+WHERE t.count = (
+	SELECT t.count
+	FROM travel t
+	ORDER BY t.count DESC
+	LIMIT 1
+);
+
+#6
+SELECT *
+FROM travel t
+WHERE t.money < 5000;
+
+#7
+SELECT a.`name`
+FROM travel t, agency a
+WHERE t.aid =a.id AND t.money = (
+	SELECT t.money
+	FROM travel t, agency a
+	WHERE t.aid =a.id
+	ORDER BY t.money DESC
+	LIMIT 1
+);
+
+#8
+SELECT SUM(t.time)
+FROM travel t, agency a
+WHERE t.aid =a.id AND a.`name` = '青年旅行社';
+```
+
diff --git a/最后两周/存储函数练习题.md b/最后两周/存储函数练习题.md
new file mode 100644
index 0000000..f4ce487
--- /dev/null
+++ b/最后两周/存储函数练习题.md
@@ -0,0 +1,155 @@
+### 语法结构
+
+```sql
+DELIMITER //
+
+CREATE FUNCTION calculate_annual_salary (
+    monthly_salary DECIMAL(10, 2)
+)
+RETURNS DECIMAL(10, 2)
+DETERMINISTIC | NOT DETERMINISTIC #结果确定/不确定
+BEGIN
+    RETURN monthly_salary * 12;
+END //
+
+DELIMITER ;
+```
+
+
+
+### 表结构与数据
+
+```sql
+-- 创建数据库
+CREATE DATABASE company CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- 使用数据库
+USE company;
+
+-- 创建 department 表
+CREATE TABLE department (
+    dept_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '部门ID，主键',
+    dept_name VARCHAR(100) NOT NULL COMMENT '部门名称',
+    location VARCHAR(100) NOT NULL COMMENT '部门所在地'
+);
+
+-- 创建 job 表
+CREATE TABLE job (
+    job_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '职位ID，主键',
+    job_title VARCHAR(100) NOT NULL COMMENT '职位名称',
+    min_salary DECIMAL(10, 2) NOT NULL COMMENT '最低工资',
+    max_salary DECIMAL(10, 2) NOT NULL COMMENT '最高工资'
+);
+
+-- 创建 employee 表
+CREATE TABLE employee (
+    emp_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '员工ID，主键',
+    emp_name VARCHAR(100) NOT NULL COMMENT '员工姓名',
+    salary DECIMAL(10, 2) NOT NULL COMMENT '员工工资',
+    hire_date DATE NOT NULL COMMENT '入职日期',
+    dept_id INT COMMENT '部门ID，外键',
+    job_id INT COMMENT '职位ID，外键',
+    FOREIGN KEY (dept_id) REFERENCES department(dept_id),
+    FOREIGN KEY (job_id) REFERENCES job(job_id)
+);
+
+INSERT INTO department (dept_name, location) VALUES
+('HR', 'New York'),
+('IT', 'San Francisco'),
+('Finance', 'Chicago'),
+('Marketing', 'Los Angeles'),
+('Sales', 'Boston'),
+('Operations', 'Houston'),
+('Research', 'Seattle'),
+('Customer Support', 'Austin');
+
+INSERT INTO job (job_title, min_salary, max_salary) VALUES
+('Manager', 60000.00, 100000.00),
+('Developer', 50000.00, 80000.00),
+('Analyst', 45000.00, 70000.00),
+('Designer', 40000.00, 65000.00),
+('Sales Executive', 35000.00, 60000.00),
+('HR Specialist', 40000.00, 70000.00),
+('Finance Analyst', 50000.00, 75000.00),
+('Marketing Coordinator', 45000.00, 70000.00),
+('Operations Manager', 55000.00, 90000.00),
+('Research Scientist', 60000.00, 95000.00),
+('Customer Support Representative', 35000.00, 55000.00);
+
+INSERT INTO employee (emp_name, salary, hire_date, dept_id, job_id) VALUES
+('Alice', 70000.00, '2020-01-15', 1, 1),
+('Bob', 65000.00, '2019-03-22', 2, 2),
+('Charlie', 55000.00, '2018-07-30', 2, 3),
+('David', 60000.00, '2021-05-10', 3, 4),
+('Eva', 50000.00, '2017-11-05', 4, 5),
+('Frank', 75000.00, '2016-09-12', 5, 1),
+('Grace', 48000.00, '2022-02-20', 1, 2),
+('Henry', 52000.00, '2021-08-15', 2, 3),
+('Ivy', 58000.00, '2020-04-10', 3, 4),
+('Jack', 62000.00, '2019-12-01', 4, 5),
+('Katie', 53000.00, '2021-07-25', 5, 6),
+('Leo', 67000.00, '2018-05-18', 6, 7),
+('Mona', 49000.00, '2020-11-30', 7, 8),
+('Nina', 71000.00, '2019-02-14', 8, 9),
+('Oscar', 56000.00, '2022-03-05', 1, 10),
+('Paul', 63000.00, '2021-09-12', 2, 11),
+('Quincy', 54000.00, '2020-06-20', 3, 1),
+('Rachel', 59000.00, '2019-08-15', 4, 2),
+('Steve', 68000.00, '2018-12-10', 5, 3),
+('Tina', 51000.00, '2022-01-22', 6, 4),
+('Uma', 72000.00, '2021-04-18', 7, 5),
+('Victor', 57000.00, '2020-07-30', 8, 6),
+('Wendy', 64000.00, '2019-10-05', 1, 7),
+('Xander', 50000.00, '2022-05-12', 2, 8),
+('Yara', 69000.00, '2021-03-25', 3, 9),
+('Zack', 55000.00, '2020-09-15', 4, 10),
+('Amy', 61000.00, '2019-06-20', 5, 11),
+('Brian', 74000.00, '2018-04-10', 6, 1),
+('Cathy', 52000.00, '2022-07-18', 7, 2),
+('Derek', 67000.00, '2021-12-01', 8, 3);
+```
+
+### 练习题
+
+#### 练习题 1: 计算员工年薪
+
+创建一个存储函数 `calculate_annual_salary`，接受员工的月薪作为参数，返回其年薪（假设年薪为月薪的 12 倍）。
+
+#### 练习题 2: 计算员工工龄
+
+创建一个存储函数 `calculate_years_of_service`，接受员工的入职日期作为参数，返回该员工的工龄（以年为单位）。
+
+#### 练习题 3: 根据部门计算平均工资
+
+创建一个存储函数 `calculate_avg_salary_by_dept`，接受部门 ID 作为参数，返回该部门的平均工资。
+
+#### 练习题 4: 根据职位计算平均工资
+
+创建一个存储函数 `calculate_avg_salary_by_job`，接受职位 ID 作为参数，返回该职位的平均工资。
+
+#### 练习题 5: 计算员工税后工资
+
+创建一个存储函数 `calculate_net_salary`，接受员工的工资作为参数，返回其税后工资（假设税率为 15%）。
+
+#### 练习题 6: 判断员工是否满足加薪条件
+
+创建一个存储函数 `is_eligible_for_raise`，接受员工的工资和工龄作为参数，返回一个布尔值（1 或 0）。加薪条件如下：
+
+- 如果工资低于 60000 且工龄大于等于 3 年，返回 1（满足条件）。
+- 否则返回 0（不满足条件）。
+
+#### 练习题 7: 计算部门总工资
+
+创建一个存储函数 `calculate_total_salary_by_dept`，接受部门 ID 作为参数，返回该部门所有员工的总工资。
+
+#### 练习题 8: 计算职位总工资
+
+创建一个存储函数 `calculate_total_salary_by_job`，接受职位 ID 作为参数，返回该职位所有员工的总工资。
+
+#### 练习题 9: 判断员工是否属于高薪部门
+
+创建一个存储函数 `is_high_salary_department`，接受部门 ID 作为参数，返回一个布尔值（1 或 0）。如果该部门的平均工资大于等于 70000，返回 1（高薪部门），否则返回 0（非高薪部门）。
+
+#### 练习题 10: 计算员工的总收入
+
+创建一个存储函数 `calculate_total_income`，接受员工的工资和奖金（假设奖金为工资的 10%）作为参数，返回其总收入（工资 + 奖金）。
\ No newline at end of file
diff --git a/最后两周/存储过程练习题.md b/最后两周/存储过程练习题.md
new file mode 100644
index 0000000..41fbb3d
--- /dev/null
+++ b/最后两周/存储过程练习题.md
@@ -0,0 +1,529 @@
+### 语法结构
+
+```sql
+DELIMITER //
+
+CREATE PROCEDURE GetEmployeeCountByDept (
+    IN dept_id INT,
+    OUT employee_count INT
+)
+BEGIN
+    SELECT COUNT(*) INTO employee_count
+    FROM employee
+    WHERE dept_id = dept_id;
+END //
+
+DELIMITER ;
+
+IF condition THEN
+    -- 条件为真时执行的代码
+ELSEIF another_condition THEN
+    -- 另一个条件为真时执行的代码
+ELSE
+    -- 所有条件都不满足时执行的代码
+END IF;
+
+CASE expression
+    WHEN value1 THEN
+        -- 当 expression = value1 时执行的代码
+    WHEN value2 THEN
+        -- 当 expression = value2 时执行的代码
+    ELSE
+        -- 当 expression 不匹配任何值时执行的代码
+END CASE;
+
+CASE
+    WHEN condition1 THEN
+        -- 当 condition1 为真时执行的代码
+    WHEN condition2 THEN
+        -- 当 condition2 为真时执行的代码
+    ELSE
+        -- 当所有条件都不满足时执行的代码
+END CASE;
+```
+
+
+
+---
+
+### 表结构与数据
+
+```sql
+-- 创建数据库
+CREATE DATABASE company CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- 使用数据库
+USE company;
+
+-- 创建 department 表
+CREATE TABLE department (
+    dept_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '部门ID，主键',
+    dept_name VARCHAR(100) NOT NULL COMMENT '部门名称',
+    location VARCHAR(100) NOT NULL COMMENT '部门所在地'
+);
+
+-- 创建 job 表
+CREATE TABLE job (
+    job_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '职位ID，主键',
+    job_title VARCHAR(100) NOT NULL COMMENT '职位名称',
+    min_salary DECIMAL(10, 2) NOT NULL COMMENT '最低工资',
+    max_salary DECIMAL(10, 2) NOT NULL COMMENT '最高工资'
+);
+
+-- 创建 employee 表
+CREATE TABLE employee (
+    emp_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '员工ID，主键',
+    emp_name VARCHAR(100) NOT NULL COMMENT '员工姓名',
+    salary DECIMAL(10, 2) NOT NULL COMMENT '员工工资',
+    hire_date DATE NOT NULL COMMENT '入职日期',
+    dept_id INT COMMENT '部门ID，外键',
+    job_id INT COMMENT '职位ID，外键',
+    FOREIGN KEY (dept_id) REFERENCES department(dept_id),
+    FOREIGN KEY (job_id) REFERENCES job(job_id)
+);
+
+INSERT INTO department (dept_name, location) VALUES
+('HR', 'New York'),
+('IT', 'San Francisco'),
+('Finance', 'Chicago'),
+('Marketing', 'Los Angeles'),
+('Sales', 'Boston'),
+('Operations', 'Houston'),
+('Research', 'Seattle'),
+('Customer Support', 'Austin');
+
+INSERT INTO job (job_title, min_salary, max_salary) VALUES
+('Manager', 60000.00, 100000.00),
+('Developer', 50000.00, 80000.00),
+('Analyst', 45000.00, 70000.00),
+('Designer', 40000.00, 65000.00),
+('Sales Executive', 35000.00, 60000.00),
+('HR Specialist', 40000.00, 70000.00),
+('Finance Analyst', 50000.00, 75000.00),
+('Marketing Coordinator', 45000.00, 70000.00),
+('Operations Manager', 55000.00, 90000.00),
+('Research Scientist', 60000.00, 95000.00),
+('Customer Support Representative', 35000.00, 55000.00);
+
+INSERT INTO employee (emp_name, salary, hire_date, dept_id, job_id) VALUES
+('Alice', 70000.00, '2020-01-15', 1, 1),
+('Bob', 65000.00, '2019-03-22', 2, 2),
+('Charlie', 55000.00, '2018-07-30', 2, 3),
+('David', 60000.00, '2021-05-10', 3, 4),
+('Eva', 50000.00, '2017-11-05', 4, 5),
+('Frank', 75000.00, '2016-09-12', 5, 1),
+('Grace', 48000.00, '2022-02-20', 1, 2),
+('Henry', 52000.00, '2021-08-15', 2, 3),
+('Ivy', 58000.00, '2020-04-10', 3, 4),
+('Jack', 62000.00, '2019-12-01', 4, 5),
+('Katie', 53000.00, '2021-07-25', 5, 6),
+('Leo', 67000.00, '2018-05-18', 6, 7),
+('Mona', 49000.00, '2020-11-30', 7, 8),
+('Nina', 71000.00, '2019-02-14', 8, 9),
+('Oscar', 56000.00, '2022-03-05', 1, 10),
+('Paul', 63000.00, '2021-09-12', 2, 11),
+('Quincy', 54000.00, '2020-06-20', 3, 1),
+('Rachel', 59000.00, '2019-08-15', 4, 2),
+('Steve', 68000.00, '2018-12-10', 5, 3),
+('Tina', 51000.00, '2022-01-22', 6, 4),
+('Uma', 72000.00, '2021-04-18', 7, 5),
+('Victor', 57000.00, '2020-07-30', 8, 6),
+('Wendy', 64000.00, '2019-10-05', 1, 7),
+('Xander', 50000.00, '2022-05-12', 2, 8),
+('Yara', 69000.00, '2021-03-25', 3, 9),
+('Zack', 55000.00, '2020-09-15', 4, 10),
+('Amy', 61000.00, '2019-06-20', 5, 11),
+('Brian', 74000.00, '2018-04-10', 6, 1),
+('Cathy', 52000.00, '2022-07-18', 7, 2),
+('Derek', 67000.00, '2021-12-01', 8, 3);
+```
+
+
+
+---
+
+### 练习题
+
+#### 练习题 1: 插入新员工
+
+创建一个存储过程 `add_employee`，接受员工姓名、工资、入职日期、部门ID和职位ID作为参数，并将其插入到 `employee` 表中。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS add_employee;
+CREATE PROCEDURE add_employee(IN emp_name VARCHAR(100), IN salary DECIMAL(10,2), IN hire_date DATE, IN dept_id INT, IN job_id INT)
+BEGIN
+	INSERT INTO employee()
+	VALUES(DEFAULT, emp_name, salary, hire_date, dept_id, job_id);
+END $$
+DELIMITER ;
+
+CALL add_employee('李泽龙', 6666, '2025-3-20', 1, 1);
+```
+
+
+
+#### 练习题 2: 更新员工工资
+
+创建一个存储过程 `update_employee_salary`，接受员工ID和新的工资作为参数，更新该员工的工资。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS update_employee_salary;
+CREATE PROCEDURE update_employee_salary(IN emp_id INT, IN salary DECIMAL(10, 2))
+BEGIN
+	UPDATE employee e 
+	SET e.salary = salary
+	WHERE e.emp_id = emp_id;
+END $$
+DELIMITER ;
+CALL update_employee_salary(1, 60000);
+```
+
+
+
+#### 练习题 3: 删除员工
+
+创建一个存储过程 `delete_employee`，接受员工ID作为参数，删除该员工的记录。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS delete_employee;
+CREATE PROCEDURE delete_employee(IN id INT)
+BEGIN
+	DELETE FROM employee
+	WHERE emp_id = id;
+END $$
+DELIMITER ;
+
+CALL delete_employee(1);
+```
+
+
+
+#### 练习题 4: 查询部门员工
+
+创建一个存储过程 `get_department_employees`，接受部门ID作为参数，返回该部门所有员工的详细信息。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_department_employees;
+CREATE PROCEDURE get_department_employees(IN id INT)
+BEGIN
+	SELECT e.*
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL get_department_employees(1);
+```
+
+
+
+#### 练习题 5: 查询职位员工
+
+创建一个存储过程 `get_job_employees`，接受职位ID作为参数，返回该职位所有员工的详细信息。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_job_employees;
+CREATE PROCEDURE get_job_employees(IN id INT)
+BEGIN
+	SELECT e.*
+	FROM employee e
+	WHERE e.job_id = id;
+END $$
+DELIMITER ;
+CALL get_job_employees(1);
+```
+
+
+
+#### 练习题 6: 计算部门平均工资
+
+创建一个存储过程 `calculate_avg_salary_by_dept`，接受部门ID作为参数，返回该部门的平均工资。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS calculate_avg_salary_by_dept;
+CREATE PROCEDURE calculate_avg_salary_by_dept(IN id INT)
+BEGIN
+	SELECT AVG(e.salary)
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL calculate_avg_salary_by_dept(1);
+```
+
+
+
+#### 练习题 7: 计算职位平均工资
+
+创建一个存储过程 `calculate_avg_salary_by_job`，接受职位ID作为参数，返回该职位的平均工资。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS calculate_avg_salary_by_job;
+CREATE PROCEDURE calculate_avg_salary_by_job(IN id INT)
+BEGIN
+	SELECT AVG(e.salary)
+	FROM employee e
+	WHERE e.job_id = id;
+END $$
+DELIMITER ;
+CALL calculate_avg_salary_by_job(1);
+```
+
+
+
+#### 练习题 8: 查询高薪员工
+
+创建一个存储过程 `get_high_salary_employees`，接受一个工资阈值作为参数，返回所有工资高于该阈值的员工。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_high_salary_employees;
+CREATE PROCEDURE get_high_salary_employees(IN sal DECIMAL(10, 2))
+BEGIN
+	SELECT e.*
+	FROM employee e
+	WHERE e.salary > sal;
+END $$
+DELIMITER ;
+CALL get_high_salary_employees(50000);
+```
+
+
+
+#### 练习题 9: 查询员工工龄
+
+创建一个存储过程 `get_employee_years_of_service`，接受员工ID作为参数，返回该员工的工龄（以年为单位）。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_employee_years_of_service;
+CREATE PROCEDURE get_employee_years_of_service(IN id INT)
+BEGIN
+	SELECT -TIMESTAMPDIFF(YEAR,NOW(),e.hire_date)
+	FROM employee e
+	WHERE e.emp_id = id;
+END $$
+DELIMITER ;
+CALL get_employee_years_of_service(1);
+```
+
+
+
+#### 练习题 10: 查询部门员工总数
+
+创建一个存储过程 `get_department_employee_count`，接受部门ID作为参数，返回该部门的员工总数。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_department_employee_count;
+CREATE PROCEDURE get_department_employee_count(IN id INT)
+BEGIN
+	SELECT COUNT(*)
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL get_department_employee_count(1);
+```
+
+
+
+#### 练习题 11: 查询职位员工总数
+
+创建一个存储过程 `get_job_employee_count`，接受职位ID作为参数，返回该职位的员工总数。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_job_employee_count;
+CREATE PROCEDURE get_job_employee_count(IN id INT)
+BEGIN
+	SELECT COUNT(*)
+	FROM employee e
+	WHERE e.job_id = id;
+END $$
+DELIMITER ;
+CALL get_job_employee_count(1);
+```
+
+
+
+#### 练习题 12: 查询员工详细信息
+
+创建一个存储过程 `get_employee_details`，接受员工ID作为参数，返回该员工的姓名、工资、部门名称和职位名称。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_employee_details;
+CREATE PROCEDURE get_employee_details(IN emp_id INT)
+BEGIN
+	SELECT e.emp_name, e.salary, d.dept_name, j.job_title
+	FROM employee e, department d, job j
+	WHERE e.emp_id = emp_id AND e.dept_id = d.dept_id AND e.job_id = j.job_id;
+END $$
+DELIMITER ;
+CALL get_employee_details(1);
+```
+
+
+
+#### 练习题 13: 查询部门最高工资
+
+创建一个存储过程 `get_department_max_salary`，接受部门ID作为参数，返回该部门的最高工资。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_department_max_salary;
+CREATE PROCEDURE get_department_max_salary(IN id INT)
+BEGIN
+	SELECT MAX(e.salary)
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL get_department_max_salary(1);
+```
+
+
+
+#### 练习题 14: 查询职位最低工资
+
+创建一个存储过程 `get_job_min_salary`，接受职位ID作为参数，返回该职位的最低工资。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_job_min_salary;
+CREATE PROCEDURE get_job_min_salary(IN id INT)
+BEGIN
+	SELECT MIN(e.salary)
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL get_job_min_salary(1);
+```
+
+
+
+#### 练习题 15: 查询员工工资排名
+
+创建一个存储过程 `get_employee_salary_rank`，接受员工ID作为参数，返回该员工在公司中的工资排名。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_employee_salary_rank;
+CREATE PROCEDURE get_employee_salary_rank(IN emp_id INT)
+BEGIN
+	SELECT COUNT(*) + 1
+	FROM employee e
+	WHERE e.salary > (
+		SELECT e.salary
+		FROM employee e
+		WHERE e.emp_id = emp_id
+	);
+END $$
+DELIMITER ;
+
+CALL get_employee_salary_rank(2);
+```
+
+
+
+#### 练习题 16: 查询部门工资总和
+
+创建一个存储过程 `get_department_total_salary`，接受部门ID作为参数，返回该部门所有员工的工资总和。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_department_total_salary;
+CREATE PROCEDURE get_department_total_salary(IN id INT)
+BEGIN
+	SELECT SUM(e.salary)
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL get_department_total_salary(1);
+```
+
+
+
+#### 练习题 17: 查询职位工资总和
+
+创建一个存储过程 `get_job_total_salary`，接受职位ID作为参数，返回该职位所有员工的工资总和。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_job_total_salary;
+CREATE PROCEDURE get_job_total_salary(IN id INT)
+BEGIN
+	SELECT SUM(e.salary)
+	FROM employee e
+	WHERE e.job_id = id;
+END $$
+DELIMITER ;
+CALL get_job_total_salary(1);
+```
+
+
+
+#### 练习题 18: 查询员工入职年份分布
+
+创建一个存储过程 `get_employees_by_hire_year`，接受年份作为参数，返回该年份入职的所有员工。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_employees_by_hire_year;
+CREATE PROCEDURE get_employees_by_hire_year(IN y INT)
+BEGIN
+	SELECT *
+	FROM employee e
+	WHERE YEAR(e.hire_date) = y;
+END $$
+DELIMITER ;
+CALL get_employees_by_hire_year(2020);
+```
+
+
+
+#### 练习题 19: 查询部门工资分布
+
+创建一个存储过程 `get_department_salary_distribution`，接受部门ID作为参数，返回该部门工资的分布情况（如最高、最低、平均工资）。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_department_salary_distribution;
+CREATE PROCEDURE get_department_salary_distribution(IN id INT)
+BEGIN
+	SELECT MAX(e.salary), MIN(e.salary), AVG(e.salary)
+	FROM employee e
+	WHERE e.dept_id = id;
+END $$
+DELIMITER ;
+CALL get_department_salary_distribution(1);
+```
+
+
+
+#### 练习题 20: 查询职位工资分布
+
+创建一个存储过程 `get_job_salary_distribution`，接受职位ID作为参数，返回该职位工资的分布情况（如最高、最低、平均工资）。
+
+```sql
+DELIMITER $$
+DROP PROCEDURE IF EXISTS get_job_salary_distribution;
+CREATE PROCEDURE get_job_salary_distribution(IN id INT)
+BEGIN
+	SELECT MAX(e.salary), MIN(e.salary), AVG(e.salary)
+	FROM employee e
+	WHERE e.job_id = id;
+END $$
+DELIMITER ;
+CALL get_job_salary_distribution(1);
+```
+
diff --git a/最后两周/触发器练习题.md b/最后两周/触发器练习题.md
new file mode 100644
index 0000000..4a8d963
--- /dev/null
+++ b/最后两周/触发器练习题.md
@@ -0,0 +1,610 @@
+### 语法结构
+
+```sql
+DELIMITER //
+CREATE TRIGGER trigger_name
+{BEFORE | AFTER} {INSERT | UPDATE | DELETE} ON table_name
+FOR EACH ROW
+BEGIN
+    -- 触发器的逻辑代码
+    -- 可以包含 SQL 语句、流程控制语句（如 IF、CASE 等）、变量声明等
+END//
+DELIMITER ;
+```
+
+### 表结构和数据
+
+```sql
+-- 创建数据库
+CREATE DATABASE company CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- 使用数据库
+USE company;
+
+-- 创建 department 表
+CREATE TABLE department (
+    dept_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '部门ID，主键',
+    dept_name VARCHAR(100) NOT NULL COMMENT '部门名称',
+    location VARCHAR(100) NOT NULL COMMENT '部门所在地'
+);
+
+-- 创建 job 表
+CREATE TABLE job (
+    job_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '职位ID，主键',
+    job_title VARCHAR(100) NOT NULL COMMENT '职位名称',
+    min_salary DECIMAL(10, 2) NOT NULL COMMENT '最低工资',
+    max_salary DECIMAL(10, 2) NOT NULL COMMENT '最高工资'
+);
+
+-- 创建 employee 表
+CREATE TABLE employee (
+    emp_id INT AUTO_INCREMENT PRIMARY KEY COMMENT '员工ID，主键',
+    emp_name VARCHAR(100) NOT NULL COMMENT '员工姓名',
+    salary DECIMAL(10, 2) NOT NULL COMMENT '员工工资',
+    hire_date DATE NOT NULL COMMENT '入职日期',
+    dept_id INT COMMENT '部门ID，外键',
+    job_id INT COMMENT '职位ID，外键',
+    FOREIGN KEY (dept_id) REFERENCES department(dept_id),
+    FOREIGN KEY (job_id) REFERENCES job(job_id)
+);
+
+INSERT INTO department (dept_name, location) VALUES
+('HR', 'New York'),
+('IT', 'San Francisco'),
+('Finance', 'Chicago'),
+('Marketing', 'Los Angeles'),
+('Sales', 'Boston'),
+('Operations', 'Houston'),
+('Research', 'Seattle'),
+('Customer Support', 'Austin');
+
+INSERT INTO job (job_title, min_salary, max_salary) VALUES
+('Manager', 60000.00, 100000.00),
+('Developer', 50000.00, 80000.00),
+('Analyst', 45000.00, 70000.00),
+('Designer', 40000.00, 65000.00),
+('Sales Executive', 35000.00, 60000.00),
+('HR Specialist', 40000.00, 70000.00),
+('Finance Analyst', 50000.00, 75000.00),
+('Marketing Coordinator', 45000.00, 70000.00),
+('Operations Manager', 55000.00, 90000.00),
+('Research Scientist', 60000.00, 95000.00),
+('Customer Support Representative', 35000.00, 55000.00);
+
+INSERT INTO employee (emp_name, salary, hire_date, dept_id, job_id) VALUES
+('Alice', 70000.00, '2020-01-15', 1, 1),
+('Bob', 65000.00, '2019-03-22', 2, 2),
+('Charlie', 55000.00, '2018-07-30', 2, 3),
+('David', 60000.00, '2021-05-10', 3, 4),
+('Eva', 50000.00, '2017-11-05', 4, 5),
+('Frank', 75000.00, '2016-09-12', 5, 1),
+('Grace', 48000.00, '2022-02-20', 1, 2),
+('Henry', 52000.00, '2021-08-15', 2, 3),
+('Ivy', 58000.00, '2020-04-10', 3, 4),
+('Jack', 62000.00, '2019-12-01', 4, 5),
+('Katie', 53000.00, '2021-07-25', 5, 6),
+('Leo', 67000.00, '2018-05-18', 6, 7),
+('Mona', 49000.00, '2020-11-30', 7, 8),
+('Nina', 71000.00, '2019-02-14', 8, 9),
+('Oscar', 56000.00, '2022-03-05', 1, 10),
+('Paul', 63000.00, '2021-09-12', 2, 11),
+('Quincy', 54000.00, '2020-06-20', 3, 1),
+('Rachel', 59000.00, '2019-08-15', 4, 2),
+('Steve', 68000.00, '2018-12-10', 5, 3),
+('Tina', 51000.00, '2022-01-22', 6, 4),
+('Uma', 72000.00, '2021-04-18', 7, 5),
+('Victor', 57000.00, '2020-07-30', 8, 6),
+('Wendy', 64000.00, '2019-10-05', 1, 7),
+('Xander', 50000.00, '2022-05-12', 2, 8),
+('Yara', 69000.00, '2021-03-25', 3, 9),
+('Zack', 55000.00, '2020-09-15', 4, 10),
+('Amy', 61000.00, '2019-06-20', 5, 11),
+('Brian', 74000.00, '2018-04-10', 6, 1),
+('Cathy', 52000.00, '2022-07-18', 7, 2),
+('Derek', 67000.00, '2021-12-01', 8, 3);
+```
+
+### `SIGNAL` 语句的基本语法
+
+```sql
+SIGNAL SQLSTATE '状态码'
+SET MESSAGE_TEXT = '错误消息';
+```
+
+- **SQLSTATE**：一个 5 字符的字符串，表示错误的状态码。MySQL 使用 `'45000'` 表示用户定义的错误。
+- **MESSAGE_TEXT**：自定义的错误消息，用于描述错误的原因。
+
+### 练习题
+
+#### 练习题 1: 工资范围验证
+
+创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据之前，检查员工的工资是否在其对应职位的 `min_salary` 和 `max_salary` 范围内。如果超出范围，阻止插入并抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+
+	IF NEW.salary > (
+		SELECT j.max_salary
+		FROM job j
+		WHERE j.job_id = NEW.job_id
+	) OR NEW.salary < (
+		SELECT j.min_salary
+		FROM job j
+		WHERE j.job_id = NEW.job_id
+	) THEN
+		SIGNAL SQLSTATE '45000'
+		SET MESSAGE_TEXT = '工资值错误，不在职务工资范围内';
+	END IF;
+END $$
+DELIMITER ;
+
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 0, NOW(), 1, 1);
+```
+
+
+
+#### 练习题 2: 自动更新部门人数
+
+创建一个触发器 `after_employee_insert`，在插入 `employee` 表数据之后，自动更新 `department` 表中的部门人数（假设 `department` 表新增一个字段 `employee_count`）。
+
+```sql
+ALTER TABLE department ADD employee_count INT UNSIGNED;
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_insert;
+CREATE TRIGGER after_employee_insert
+AFTER INSERT ON employee
+FOR EACH ROW
+BEGIN
+		UPDATE department d
+		SET d.employee_count = (
+			SELECT COUNT(*)
+			FROM employee e
+			WHERE e.dept_id = d.dept_id
+		);
+END $$
+DELIMITER ;
+
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 60000.00, NOW(), 1, 1);
+```
+
+
+
+#### 练习题 3: 工资变更日志
+
+创建一个触发器 `after_employee_update`，在更新 `employee` 表的 `salary` 字段后，将变更记录插入到一个新的日志表 `salary_log` 中，记录员工 ID、旧工资、新工资和变更时间。
+
+```sql
+DROP TABLE IF EXISTS salary_log;
+CREATE TABLE salary_log(
+	emp_id INT,
+	old_salary DECIMAL(10, 2),
+	new_slaray DECIMAL(10, 2),
+	update_date DATE
+);
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_update;
+CREATE TRIGGER after_employee_update
+BEFORE UPDATE ON employee
+FOR EACH ROW
+BEGIN
+		IF NEW.salary <> OLD.salary THEN
+			INSERT INTO salary_log()
+			VALUES(NEW.emp_id, OLD.salary, NEW.salary, NOW());
+		END IF;
+END $$
+DELIMITER ;
+
+UPDATE employee e
+SET e.salary = 10
+WHERE e.emp_id = 1;
+```
+
+
+
+#### 练习题 4: 删除员工时备份数据
+
+创建一个触发器 `before_employee_delete`，在删除 `employee` 表数据之前，将被删除的员工数据插入到一个备份表 `employee_backup` 中。
+
+```sql
+CREATE TABLE employee_backup AS
+SELECT *
+FROM employee
+WHERE 0;
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_delete;
+CREATE TRIGGER before_employee_delete
+BEFORE DELETE ON employee
+FOR EACH ROW
+BEGIN
+		INSERT INTO employee_backup()
+		VALUES(OLD.emp_id, OLD.emp_name, OLD.salary, OLD.hire_date, OLD.dept_id, OLD.job_id);
+END $$
+DELIMITER ;
+
+DELETE FROM employee
+WHERE emp_id = 20;
+```
+
+
+
+#### 练习题 5: 自动设置默认职位
+
+创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据时，如果未指定 `job_id`，则自动将其设置为 `job` 表中的默认职位（假设默认职位的 `job_id` 为 1）。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+		IF NEW.job_id IS NULL THEN
+			SET NEW.job_id = 1;
+		END IF;
+END $$
+DELIMITER ;
+
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 60000.00, NOW(), 1, NULL);
+```
+
+
+
+#### 练习题 6: 防止修改入职日期
+
+创建一个触发器 `before_employee_update`，在更新 `employee` 表数据时，防止修改 `hire_date` 字段。如果尝试修改，抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_update;
+CREATE TRIGGER before_employee_update
+BEFORE UPDATE ON employee
+FOR EACH ROW
+BEGIN
+	IF NEW.hire_date <> OLD.hire_date THEN
+			SIGNAL SQLSTATE '45000'
+			SET MESSAGE_TEXT='不允许修改用户的入职时间';
+	END IF;
+END $$
+DELIMITER ;
+UPDATE employee e
+SET e.hire_date = '2025-3-20'
+WHERE e.emp_id = 1;
+```
+
+
+
+#### 练习题 7: 自动计算工龄
+
+创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据时，自动计算员工的工龄（以年为单位），并将其存储到一个新字段 `years_of_service` 中。
+
+```sql
+ALTER TABLE employee ADD years_of_service INT;
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+	SET NEW.years_of_service = TIMESTAMPDIFF(YEAR,NEW.hire_date,NOW());
+END $$
+DELIMITER ;
+
+SELECT TIMESTAMPDIFF(YEAR,e.hire_date,NOW())
+FROM employee e;
+
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 60000.00, '2022-12-31', 1, 1, NULL);
+```
+
+
+
+#### 练习题 8: 防止删除部门
+
+创建一个触发器 `before_department_delete`，在删除 `department` 表数据之前，检查该部门是否还有员工。如果有员工，阻止删除并抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_department_delete;
+CREATE TRIGGER before_department_delete
+BEFORE DELETE ON department
+FOR EACH ROW
+BEGIN
+	IF (SELECT COUNT(*) FROM employee e WHERE e.dept_id = OLD.dept_id) > 0 THEN
+		SIGNAL SQLSTATE '45000'
+		SET MESSAGE_TEXT = '该部门有员工无法删除';
+	END IF;
+END $$
+DELIMITER ;
+
+DELETE FROM department
+WHERE dept_id = 1;
+```
+
+
+
+#### 练习题 9: 自动更新职位工资范围
+
+创建一个触发器 `after_job_update`，在更新 `job` 表的 `min_salary` 或 `max_salary` 字段后，自动调整 `employee` 表中相关员工的工资，使其符合新的工资范围。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_job_update;
+CREATE TRIGGER after_job_update
+AFTER UPDATE ON job
+FOR EACH ROW
+BEGIN
+	UPDATE employee
+	SET salary = IF(salary > NEW.max_salary, NEW.max_salary, IF(salary < NEW.min_salary, min_salary, salary))
+	WHERE job_id = NEW.job_id;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 10: 记录部门变更
+
+创建一个触发器 `after_employee_update`，在更新 `employee` 表的 `dept_id` 字段后，将变更记录插入到一个新的日志表 `department_change_log` 中，记录员工 ID、旧部门 ID、新部门 ID 和变更时间。
+
+```sql
+CREATE TABLE department_change_log(
+	emp_id INT,
+	old_dept_id INT,
+	new_dept_id INT,
+	update_date DATE
+);
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_update;
+CREATE TRIGGER after_employee_update
+AFTER UPDATE ON employee
+FOR EACH ROW
+BEGIN
+	IF NEW.dept_id <> OLD.dept_id THEN
+		INSERT INTO department_change_log()
+		VALUES(NEW.emp_id, OLD.dept_id, NEW.dept_id, NOW());
+	END IF;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 11: 防止插入重复职位
+
+创建一个触发器 `before_job_insert`，在插入 `job` 表数据之前，检查职位名称是否已存在。如果存在，阻止插入并抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_job_insert;
+CREATE TRIGGER before_job_insert
+BEFORE INSERT ON job
+FOR EACH ROW
+BEGIN
+	IF (SELECT COUNT(*) FROM job WHERE job_id = NEW.job_id) = 1  THEN
+			SIGNAL SQLSTATE '45000'
+			SET MESSAGE_TEXT = '职位名称已存在';
+	END IF;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 12: 自动更新员工总数
+
+创建一个触发器 `after_employee_insert`，在插入 `employee` 表数据之后，自动更新一个统计表 `employee_statistics` 中的员工总数。
+
+```sql
+CREATE TABLE employee_statistics(
+	marking VARCHAR(20),
+	num INT
+);
+INSERT INTO employee_statistics()
+VALUES('count', 0);
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_insert;
+CREATE TRIGGER after_employee_insert
+AFTER INSERT ON employee
+FOR EACH ROW
+BEGIN
+	UPDATE employee_statistics
+	SET num = (SELECT COUNT(*) FROM employee)
+	WHERE marking = 'count';
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 13: 防止修改部门所在地
+
+创建一个触发器 `before_department_update`，在更新 `department` 表数据时，防止修改 `location` 字段。如果尝试修改，抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_department_update;
+CREATE TRIGGER before_department_update
+BEFORE UPDATE ON department
+FOR EACH ROW
+BEGIN
+	IF NEW.location <> OLD.location THEN
+		SIGNAL SQLSTATE '45000'
+		SET MESSAGE_TEXT = '无法更新部分的位置';
+	END IF;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 14: 自动调整工资
+
+创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据时，如果工资低于职位的最低工资，则自动将其调整为最低工资。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+	IF NEW.salary < (SELECT min_salary FROM job WHERE job_id = NEW.job_id ) THEN
+		SET NEW.salary = min_salary;
+	END IF;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 15: 记录职位变更
+
+创建一个触发器 `after_employee_update`，在更新 `employee` 表的 `job_id` 字段后，将变更记录插入到一个新的日志表 `job_change_log` 中，记录员工 ID、旧职位 ID、新职位 ID 和变更时间。
+
+```sql
+CREATE TABLE job_change_log(
+	emp_id INT,
+	old_job_id INT,
+	new_job_id INT,
+	update_date DATE
+);
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_update;
+CREATE TRIGGER after_employee_update
+AFTER UPDATE ON employee
+FOR EACH ROW
+BEGIN
+	IF NEW.job_id <> OLD.job_id THEN
+		INSERT INTO job_change_log()
+		VALUES(NEW.emp_id, OLD.job_id, NEW.job_id, NOW());
+	END IF;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 16: 防止删除职位
+
+创建一个触发器 `before_job_delete`，在删除 `job` 表数据之前，检查该职位是否还有员工。如果有员工，阻止删除并抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_job_delete;
+CREATE TRIGGER before_job_delete
+BEFORE DELETE ON job
+FOR EACH ROW
+BEGIN
+	IF (SELECT COUNT(*) FROM employee WHERE job_id = OLD.job_id) > 0 THEN
+		SIGNAL SQLSTATE '45000'
+		SET MESSAGE_TEXT = '该职位还有员工';
+	END IF;
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 17: 自动更新部门平均工资
+
+创建一个触发器 `after_employee_insert`，在插入 `employee` 表数据之后，自动更新 `department` 表中的部门平均工资（假设 `department` 表新增一个字段 `avg_salary`）。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_insert;
+CREATE TRIGGER after_employee_insert
+AFTER INSERT ON employee
+FOR EACH ROW
+BEGIN
+	UPDATE department d
+	SET d.avg_salary = (SELECT AVG(e.salary) FROM employee e WHERE d.dept_id = e.dept_id)
+	WHERE NEW.dept_id = d.dept_id;
+
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 18: 防止插入未来入职日期
+
+创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据时，检查 `hire_date` 是否晚于当前日期。如果是，阻止插入并抛出错误。
+
+```sql
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+	IF NEW.hire_date < CURDATE() THEN
+		SIGNAL SQLSTATE '45000'
+		SET MESSAGE_TEXT = '入职日期不得晚于当前日期';
+	END IF;
+
+END $$
+DELIMITER ;
+```
+
+
+
+#### 练习题 19: 自动生成员工编号
+
+创建一个触发器 `before_employee_insert`，在插入 `employee` 表数据时，自动生成一个唯一的员工编号（格式为 `EMP-年份-序号`，例如 `EMP-2023-001`），并将其存储到一个新字段 `emp_code` 中。
+
+```sql
+ALTER TABLE employee ADD emp_code VARCHAR(30);
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS before_employee_insert;
+CREATE TRIGGER before_employee_insert
+BEFORE INSERT ON employee
+FOR EACH ROW
+BEGIN
+	SET NEW.emp_code = CONCAT('EMP-',YEAR(NOW()),'-', (LAST_INSERT_ID()+1));
+END $$
+DELIMITER ;
+INSERT INTO employee
+VALUES(DEFAULT, '雷昊', 0, NOW(), 1, 1, NULL, NULL);
+```
+
+
+
+#### 练习题 20: 记录员工离职
+
+创建一个触发器 `after_employee_delete`，在删除 `employee` 表数据之后，将被删除的员工信息插入到一个离职记录表 `employee_exit_log` 中，记录员工 ID、姓名、离职时间和原因（假设原因由用户输入）。
+
+```sql
+CREATE TABLE employee_exit_log(
+	emp_id INT,
+	emp_name VARCHAR(20),
+	quit_date DATE,
+	quit_reason VARCHAR(50)
+);
+
+DELIMITER $$
+DROP TRIGGER IF EXISTS after_employee_delete;
+CREATE TRIGGER after_employee_delete
+AFTER DELETE ON employee
+FOR EACH ROW
+BEGIN
+	INSERT INTO employee_exit_log()
+	VALUES(OLD.emp_id, OLD.emp_name, NOW(), NULL);
+END $$
+DELIMITER ;
+```
+
diff --git a/调考试题/准易3月/Prog1.c b/调考试题/准易3月/Prog1.c
index ec0df4a..7453a45 100644
--- a/调考试题/准易3月/Prog1.c
+++ b/调考试题/准易3月/Prog1.c
@@ -1,16 +1,16 @@
 
 /*----------------------------------------------------------------------
-【程序设计】
+��������ơ�
 ------------------------------------------------------------------------
-编写一个 C 语言函数，函数接收一个整数数组 arr 以及数组的长度 size 作为参数，使用 bool 类型返回该数组中是否存在重复的元素。在 main 函数中，输入多个正整数（输入非数字字符表示输入结束）并调用该函数，根据返回结果输出相应的提示信息。
-示例：
-【请输入多个整数（输入非数字字符结束输入）：】1 2 3 4 5 5 6 a
-数组中存在重复元素。
+��дһ�� C ���Ժ�������������һ���������� arr �Լ�����ij��� size ��Ϊ������ʹ�� bool ���ͷ��ظ��������Ƿ�����ظ���Ԫ�ء��� main �����У�������������������������ַ���ʾ��������������øú��������ݷ��ؽ�������Ӧ����ʾ��Ϣ��
+ʾ����
+��������������������������ַ��������룩����1 2 3 4 5 5 6 a
+�����д����ظ�Ԫ�ء�
 ------------------------------------------------------------------------
-注意：部分源程序给出如下。请勿改动主函数 main 或其它函数中给出的内容，仅在
-      Program-End之间填入若干语句。
-      不要删除标志否则不得分。
-      不要修改或删除Program-End之外的内容否则不得分。
+ע�⣺����Դ����������¡�����Ķ������� main �����������и��������ݣ�����
+      Program-End֮������������䡣
+      ��Ҫɾ����־���򲻵÷֡�
+      ��Ҫ�޸Ļ�ɾ��Program-End֮������ݷ��򲻵÷֡�
 ----------------------------------------------------------------------*/
 #include <stdio.h>
 #include <stdbool.h>
@@ -36,12 +36,12 @@ int main() {
     int *arr = (int *)malloc(capacity * sizeof(int));
   
     if (arr == NULL) {
-        printf("内存分配失败！\n");
+        printf("�ڴ����ʧ�ܣ�\n");
         return 1;
     }
     int size = 0;  
     int num;
-    printf("【请输入多个整数（输入非数字字符结束输入）：】");
+    printf("��������������������������ַ��������룩����");
     
     while (scanf("%d", &num) == 1) {
         
@@ -50,7 +50,7 @@ int main() {
             arr = (int *)realloc(arr, capacity * sizeof(int));
             
             if (arr == NULL) {
-                printf("内存分配失败！\n");
+                printf("�ڴ����ʧ�ܣ�\n");
                 return 1;
             }
         }
@@ -62,9 +62,9 @@ int main() {
 
     
     if (hasDuplicates(arr, size)) {
-        printf("数组中存在重复元素。\n");
+        printf("�����д����ظ�Ԫ�ء�\n");
     } else {
-        printf("数组中不存在重复元素。\n");
+        printf("�����в������ظ�Ԫ�ء�\n");
     }
 
     
diff --git a/调考试题/准易3月/Prog2.c b/调考试题/准易3月/Prog2.c
index bac2be0..d85fda8 100644
--- a/调考试题/准易3月/Prog2.c
+++ b/调考试题/准易3月/Prog2.c
@@ -1,43 +1,43 @@
 /*----------------------------------------------------------------------
-【程序设计】
+��������ơ�
 ------------------------------------------------------------------------
-现在有一位赛车手要驾驶一台电动摩托车去完成多段赛程。这台电动摩托车的电池电量存储
-上限是 100 度电哦，它有一个标称的平均电耗，也就是每行驶 100 公里，就会消耗 10度
-电。这里有个很重要的前提条件要大家牢记呀，每一段赛程的距离都是小于 600 公里的哦，
-并且每次出发的时候，电动摩托车的电池都是充满电的状态呢。还有一个关键的规则得注意
-哦，如果电动摩托车到达某个地点之后，赛车手查看发现电池内剩余的电量低于电池总电量
-的 10%（也就是 100×10% = 10 度电或者更少啦），那这个时候就必须得在这个地方给电
-动摩托车充电了呢，请帮忙计算一下，这名驾驶员在赛程中的哪几段赛程前是需要充电的。
+������һλ������Ҫ��ʻһ̨�綯Ħ�г�ȥ��ɶ�����̡���̨�綯Ħ�г��ĵ�ص����洢
+������ 100 �ȵ�Ŷ������һ����Ƶ�ƽ����ģ�Ҳ����ÿ��ʻ 100 ����ͻ����� 10��
+�硣�����и�����Ҫ��ǰ������Ҫ����μ�ѽ��ÿһ�����̵ľ��붼��С�� 600 �����Ŷ��
+����ÿ�γ�����ʱ�򣬵綯Ħ�г��ĵ�ض��dz������״̬�ء�����һ���ؼ��Ĺ����ע��
+Ŷ������綯Ħ�г�����ij���ص�֮�������ֲ鿴���ֵ����ʣ��ĵ������ڵ���ܵ���
+�� 10%��Ҳ���� 100��10% = 10 �ȵ���߸��������������ʱ��ͱ����������ط�����
+��Ħ�г�������أ����æ����һ�£�������ʻԱ�������е��ļ�������ǰ����Ҫ���ġ�
 
-示例1：
-【请输入赛程段数：】
+ʾ��1��
+�����������̶�������
 5
-【请输入各段赛程距离，单位公里：】
+��������������̾��룬��λ�����
 380 200 390 400 300
-【需要在以下几段赛程前充电：】
-第 3 段赛程前
-第 5 段赛程前
+����Ҫ�����¼�������ǰ��磺��
+�� 3 ������ǰ
+�� 5 ������ǰ
 
-示例2：
-【请输入赛程段数：】
+ʾ��2��
+�����������̶�������
 4
-【请输入各段赛程距离，单位公里：】
+��������������̾��룬��λ�����
 190 140 110 80 
-无需充电。
+�����硣
 
 ------------------------------------------------------------------------
-注意：部分源程序给出如下。请勿改动主函数 main 或其它函数中给出的内容，仅在
-      Program-End之间填入若干语句。
-      不要删除标志否则不得分。
-      不要修改或删除Program-End之外的内容否则不得分。
+ע�⣺����Դ����������¡�����Ķ������� main �����������и��������ݣ�����
+      Program-End֮������������䡣
+      ��Ҫɾ����־���򲻵÷֡�
+      ��Ҫ�޸Ļ�ɾ��Program-End֮������ݷ��򲻵÷֡�
 ----------------------------------------------------------------------*/
 #include <stdio.h>
-#include <stdlib.h>  // 引入stdlib.h用于动态内存分配相关操作
+#include <stdlib.h>  // ����stdlib.h���ڶ�̬�ڴ������ز���
 
-#define TANK_CAPACITY 100  // 电池总容量（单位：度）
-#define LOW_FUEL_LIMIT (0.10 * TANK_CAPACITY)  // 低电量阈值（10%）
-#define AVG_CONSUMPTION_PER_100KM 10  // 平均电耗（单位：度/百公里）
-#define FUEL_CONSUMPTION_PER_KM (AVG_CONSUMPTION_PER_100KM / 100.0)  // 每公里电耗（单位：度/公里）
+#define TANK_CAPACITY 100  // �������������λ���ȣ�
+#define LOW_FUEL_LIMIT (0.10 * TANK_CAPACITY)  // �͵�����ֵ��10%��
+#define AVG_CONSUMPTION_PER_100KM 10  // ƽ����ģ���λ����/�ٹ��
+#define FUEL_CONSUMPTION_PER_KM (AVG_CONSUMPTION_PER_100KM / 100.0)  // ÿ�����ģ���λ����/���
 
 int checkRefuelStops(int trips[], int count, int results[]) {
     int refuel_count = 0;  
@@ -56,17 +56,17 @@ int checkRefuelStops(int trips[], int count, int results[]) {
 
 int main() {
     int num_trips;  
-    printf("【请输入赛程段数：】\n");
+    printf("�����������̶�������\n");
     scanf("%d", &num_trips);
 
     
     int *trips = (int *)malloc(num_trips * sizeof(int));
     if (trips == NULL) {
-        printf("内存分配失败！\n");
+        printf("�ڴ����ʧ�ܣ�\n");
         return 1;
     }
 
-    printf("【请输入各段赛程距离，单位公里：】\n");
+    printf("��������������̾��룬��λ�����\n");
     for (int i = 0; i < num_trips; ++i) {
         scanf("%d", &trips[i]);
     }
@@ -74,7 +74,7 @@ int main() {
     
     int *results = (int *)malloc(num_trips * sizeof(int));
     if (results == NULL) {
-        printf("内存分配失败！\n");
+        printf("�ڴ����ʧ�ܣ�\n");
         free(trips);  
         return 1;
     }
@@ -82,12 +82,12 @@ int main() {
     int refuel_count = checkRefuelStops(trips, num_trips, results);
 
     if (refuel_count > 0) {
-        printf("【需要在以下几段赛程前充电：】\n");
+        printf("����Ҫ�����¼�������ǰ��磺��\n");
         for (int i = 0; i < refuel_count; i++) {
-            printf("第 %d 段赛程前\n", results[i]);  
+            printf("�� %d ������ǰ\n", results[i]);  
         }
     } else {
-        printf("无需充电。\n");
+        printf("�����硣\n");
     }
 
     free(trips);