diff --git a/2207/C语言同步练习/选择结构/3.c b/2207/C语言同步练习/选择结构/3.c
new file mode 100644
index 0000000..6a75b09
--- /dev/null
+++ b/2207/C语言同步练习/选择结构/3.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main(){
+	
+	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;
+}
diff --git a/2207/C语言同步练习/选择结构/3.exe b/2207/C语言同步练习/选择结构/3.exe
new file mode 100644
index 0000000..6456a06
Binary files /dev/null and b/2207/C语言同步练习/选择结构/3.exe differ