foo.cc: In function 'int main()':
foo.cc:14:10: error: expected '}' at end of input
   14 |  return 0;
      |          ^
foo.cc:4:11: note: to match this '{'
    4 | int main(){
      |           ^
foo.cc:13:8: warning: ignoring return value of 'int system(const char*)', declared with attribute warn_unused_result [-Wunused-result]
   13 |  system("pause");
      |  ~~~~~~^~~~~~~~~

[Hydro](https://hydro.ac)提供评测服务