diff --git a/ex3/ex3.cpp b/ex3/ex3.cpp
index c7463ff..39fbeff 100644
--- a/ex3/ex3.cpp
+++ b/ex3/ex3.cpp
@@ -18,7 +18,7 @@ int main()
     v.printall();
     while (1)
     {
-        printf("选择操作:1.插入 2.删除 3.统计\n");
+        printf("选择操作:1.插入 2.删除 3.统计 4.退出\n");
         scanf("%d", &flag);
 
         switch (flag)
@@ -45,6 +45,9 @@ int main()
             (temp[1] != -1) ? (printf("一共%d个\n", temp[1])) : (printf("无此元素或超出范围\n"));
             break;
 
+        case 4:
+            return 0;
+            
         default:
             printf("返回菜单\n");
         }