feat: 测试 GCC 是否安装成功

Author: XMuli

unix_linux_01_test_gcc/main.cpp

@@ -0,0 +1,11 @@
+//  Created by muli on 2020/3/2.
+//  Copyright © 2020 muli. All rights reserved.
+//
+
+#include <iostream>
+
+int main(int argc, const char * argv[]) {
+    // insert code here...
+    std::cout << "Hello, World!\n";
+    return 0;
+}