/in/foo.cc:1:1: error: 'include' does not name a type
 include <iostream>
 ^~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:8:2: error: 'cin' was not declared in this scope
  cin>>m;
  ^~~
/in/foo.cc:21:2: error: 'cout' was not declared in this scope
  cout<<n;
  ^~~~