foo.cc:5:22: error: '_TCHAR' has not been declared
    5 | int _tmain(int argc, _TCHAR* argv[])
      |                      ^~~~~~
foo.cc: In function 'int _tmain(int, int**)':
foo.cc:23:20: error: expected '}' at end of input
   23 |     system("pause");
      |                    ^
foo.cc:6:1: note: to match this '{'
    6 | {
      | ^
foo.cc:23:20: warning: no return statement in function returning non-void [-Wreturn-type]
   23 |     system("pause");
      |                    ^
foo.cc:23:11: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result]
   23 |     system("pause");
      |     ~~~~~~^~~~~~~~~

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