/in/foo.cc: In function 'int main()':
/in/foo.cc:4:6: warning: unused variable 'n' [-Wunused-variable]
  int n,g,s,b,h=0;
      ^
/in/foo.cc:4:14: warning: unused variable 'h' [-Wunused-variable]
  int n,g,s,b,h=0;
              ^