/in/foo.cc: In function 'int main()':
/in/foo.cc:4:6: warning: unused variable 'n' [-Wunused-variable]
  int n,d;
      ^
/in/foo.cc:12:11: warning: 'd' may be used uninitialized in this function [-Wmaybe-uninitialized]
  cout << d;
           ^