/in/foo.cc: In function 'int main()':
/in/foo.cc:12:14: warning: variable 'tmp' set but not used [-Wunused-but-set-variable]
   int j; int tmp=0; 
              ^~~
/in/foo.cc:19:6: warning: unused variable 's' [-Wunused-variable]
  int s;
      ^