/in/foo.cc: In function 'int main()':
/in/foo.cc:6:2: error: 'longlong' was not declared in this scope
  longlong m;
  ^
/in/foo.cc:6:11: error: expected ';' before 'm'
  longlong m;
           ^
/in/foo.cc:7:5: error: 'm' was not declared in this scope
     m=x*3;
     ^