From fe970ef1a16cf22a55e15ae7309703ef9efbb4c7 Mon Sep 17 00:00:00 2001
From: smallkun <smallerkun@foxmail.com>
Date: Fri, 7 Mar 2025 09:31:53 +0800
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+### C语言-1
+
+```c
+/*------------------------------------------------------------------------------
+（1）【程序设计】下列给定程序中，fun函数的功能是：分别统计字符串中大写字母和小写字母的个数。
+例如，给字符串s输入：AAaaBBbb123CCcccd，则应输出：upper＝6，lower＝8。
+------------------------------------------------------------------------------*/
+#include <stdio.h>
+void fun ( char *s, int *a, int *b)
+{
+/**********Program**********/
+ while(*s != '\0'){
+ if(*s >= 'A' && *s <= 'Z'){
+ (*a)++;
+ }
+ if(*s >= 'a' && *s <= 'z'){
+ (*b)++;
+ }
+ s++;
+ }
+
+
+/********** End **********/
+}
+main( )
+{
+ char s[100];
+ int upper=0, lower=0;
+ printf( "\nPlease a string : " );
+ gets(s);
+ fun(s,&upper,&lower);
+ printf("\n upper=%d lower=%d\n",upper,lower );
+}
+
+```
+
+
+
+### C语言-2
+
+```c
+/*------------------------------------------------------------------------
+题目：函数fun的功能：将字符串str中第k个字符开始的n个字符逆序重排，
+例如：输入1,5 输出54321abcde
+ 输入3,6 输出12cba543de
+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。
+----------------------------------------------------------------------*/
+#include <stdio.h>
+#include <string.h>
+void fun(char *str, int k, int n )
+{
+ int i,j; char t;
+ for(i=k-1,j=k-1+n-1;i<j;i++,j--)
+ {
+/**********Program**********/
+ t = str[i];
+ str[i] = str[j];
+ str[j] = t;
+
+/********** End **********/
+ }
+}
+int main( )
+{
+ char str[]="12345abcde";
+ unsigned int k,n;
+ scanf("%d,%d",&k,&n);
+ if(k+n-1<=strlen(str))
+ { fun(str,k,n);
+ puts(str); }
+ else
+ printf("所输入的k,n值不合适！\n");
+ return 0;
+}
+
+```
+
+
+
+
+
+### C语言-3
+
+```c
+/*------------------------------------------------------------------
+功能：编程统计一个字符串中的字母、数字、空格和其它字符的个数。
+---------------------------------------------------------------------*/
+#include <stdio.h>
+void fun(char s[],int b[])
+{
+ int i;
+/**********Program**********/
+ i=0;
+ while(s[i] != '\0'){
+ if(s[i] >= 'a' && s[i] <= 'z' || s[i] >= 'A' && s[i] <= 'Z'){
+ b[0]++;
+ }else if(s[i] >= '0' && s[i] <= '9'){
+ b[1]++;
+ }else if(s[i] == ' '){
+ b[2]++;
+ }else{
+ b[3]++;
+ }
+ i++;
+ }
+
+/********** End **********/
+}
+
+main ()
+{
+ char s1[80];int a[4]={0};
+ int k;
+ void fun(char s[],int b[]) ;
+ gets(s1);
+ fun(s1,a);
+ puts(s1);
+ for(k=0;k<4;k++)
+ printf("%4d",a[k]);
+}
+
+```
+
+
+
+
+
+### C语言-4
+
+```c
+/*------------------------------------------------------------------------
+程序功能：从键盘输入三个整数，比较三个数并显示相应信息，具体如下：
+（1）如果三个数都相等，显示"***"；
+（2）如果三个数中只有某两个数相等，显示"@@"；
+（3）如果三个数互不相等，则显示"&"。
+（输出要换行）
+------------------------------------------------------------------------
+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之间删除【?】填入若干语句。不要删除标志否则不得分。
+----------------------------------------------------------------------*/
+#include<stdio.h>
+int main()
+{
+ int a,b,c;
+ scanf("%d%d%d",&a,&b,&c);
+ if(a==b && b==c)
+ printf("***\n");
+/**********Program**********/
+ else if(a==b || b==c || a==c)
+
+
+
+
+/********** End **********/
+printf("@@\n");
+ else printf("&\n");
+
+ return 0;
+}
+
+```
+
+
+
+
+
+### MySQL-1
+
+```sql
+#1
+CREATE TABLE t_hotel_manager(
+ mid INT PRIMARY KEY,
+ hid INT NOT NULL,
+ mname VARCHAR(10) NOT NULL,
+ mage INT NOT NULL,
+ mgender ENUM('男', '女', '未知'),
+ telephone VARCHAR(11)
+);
+#2
+#使用MODIFY添加主键字段为自动增长
+ALTER TABLE t_hotel_manager MODIFY mid INT AUTO_INCREMENT;
+#设置自增起始值
+ALTER TABLE t_hotel_manager AUTO_INCREMENT = 1000;
+#3
+INSERT INTO t_hotel_manager()
+VALUES(DEFAULT, 10001, '王璐', 32, '女', NULL);
+#4
+CREATE TABLE t_hotel_bak AS
+SELECT *
+FROM t_hotel;
+#5
+UPDATE t_client c
+SET c.integral = c.integral + 100
+WHERE c.cname LIKE '姚%';
+#6 tj11
+SELECT c.cname, SUM(r.price)
+FROM t_booking b, t_client c, t_room r
+WHERE b.cid = c.cid AND b.rid = r.rid
+GROUP BY c.cid
+ORDER BY 2 DESC
+LIMIT 9, 1;
+
+#7 tj12
+SELECT h.hname, r.price
+FROM t_hotel h, t_room r
+WHERE h.hid = r.hid AND r.rname = '大床房' AND r.price = (
+ SELECT MAX(price)
+ FROM t_room
+ WHERE rname = '大床房'
+);
+
+#8 tj13
+SELECT h.hname, r.rname, r.price
+FROM t_room r
+LEFT JOIN t_booking b ON r.rid = b.rid
+INNER JOIN t_hotel h ON r.hid = h.hid
+WHERE b.bid IS NULL;
+
+#9 视图
+CREATE VIEW v_tongji AS
+SELECT h.hname, SUM(r.price)
+FROM t_hotel h, t_booking b, t_room r
+WHERE h.hid = r.hid AND b.rid = r.rid
+GROUP BY h.hid;
+```
+
+
+
+### MySQL-2
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