diff --git a/2207/C语言同步练习源码/2.循环结构-10.c b/2207/C语言同步练习源码/2.循环结构-10.c
new file mode 100644
index 0000000..589db77
--- /dev/null
+++ b/2207/C语言同步练习源码/2.循环结构-10.c
@@ -0,0 +1,14 @@
+#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;
+}
diff --git a/2207/C语言同步练习源码/2.循环结构-8.c b/2207/C语言同步练习源码/2.循环结构-8.c
new file mode 100644
index 0000000..6cd5ffc
--- /dev/null
+++ b/2207/C语言同步练习源码/2.循环结构-8.c
@@ -0,0 +1,17 @@
+#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;
+}
diff --git a/2207/C语言同步练习源码/2.循环结构-9.c b/2207/C语言同步练习源码/2.循环结构-9.c
new file mode 100644
index 0000000..b71e9ee
--- /dev/null
+++ b/2207/C语言同步练习源码/2.循环结构-9.c
@@ -0,0 +1,19 @@
+#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;
+}
diff --git a/2207/C语言同步练习答案.md b/2207/C语言同步练习答案.md
index 56e2a32..2bfd9e0 100644
--- a/2207/C语言同步练习答案.md
+++ b/2207/C语言同步练习答案.md
@@ -361,6 +361,23 @@ int main(){
 ![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("红:%d 白:%d 黑:%d\n", i, j, k);
+				}
+			}
+		}
+	}
+
+	return 0;
+}
 ```
 
 ### 循环结构-9
@@ -368,6 +385,25 @@ int main(){
 ![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;
+}
 ```
 
 ### 循环结构-10
@@ -375,6 +411,20 @@ int main(){
 ![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;
+}
 ```
 
 ---