diff --git a/dist/change.exe b/dist/change.exe
deleted file mode 100644
index 241fe5a..0000000
Binary files a/dist/change.exe and /dev/null differ
diff --git a/dist/homework_laster.exe b/dist/homework_laster.exe
deleted file mode 100644
index 9d8d575..0000000
Binary files a/dist/homework_laster.exe and /dev/null differ
diff --git a/homework_laster.exe b/homework_laster.exe
deleted file mode 100644
index bcbeb63..0000000
Binary files a/homework_laster.exe and /dev/null differ
diff --git a/test.cpp b/maths.cpp
similarity index 95%
rename from test.cpp
rename to maths.cpp
index c3aa8bb..5364203 100644
--- a/test.cpp
+++ b/maths.cpp
@@ -19,7 +19,7 @@ int main() {
     } else if (in == 3) {
         bai1();
     } else {
-        cout << "无效输入，请输入1、2或3。" << endl; // 处理无效输入
+        cout << "无效输入,请输入1、2或3。" << endl; // 处理无效输入
     }
 
     return 0; // 返回0表示程序正常结束