diff --git a/test01.xcodeproj/xcuserdata/leo.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist b/test01.xcodeproj/xcuserdata/leo.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
new file mode 100644
index 0000000..46455da
--- /dev/null
+++ b/test01.xcodeproj/xcuserdata/leo.xcuserdatad/xcdebugger/Breakpoints_v2.xcbkptlist
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Bucket
+   uuid = "3224733E-16AC-4D1B-89D1-0C06F06AB765"
+   type = "1"
+   version = "2.0">
+</Bucket>
diff --git a/test01/main.cpp b/test01/main.cpp
index 9f683a8..4db72fd 100644
--- a/test01/main.cpp
+++ b/test01/main.cpp
@@ -1,14 +1,17 @@
-//
-//  main.cpp
-//  test01
-//
-//  Created by Leo on 2025/6/21.
-//
-
 #include <iostream>
+using namespace std;
 
-int main(int argc, const char * argv[]) {
-    // insert code here...
-    std::cout << "Hello, World!\n";
-    return 0;
+int main() {
+    /*
+     要求：编写程序，输出 1-50 之间所有能被 3 整除的数字，并统计其个数
+     */
+    int count = 0;
+    for (int i = 1; i <= 50; i++) {
+        if (i % 3 == 0) {
+            cout << i << " ";
+            count++;
+        }
+    }
+    cout << endl;
+    cout << count << endl;
 }