/in/foo.c: In function 'main':
/in/foo.c:3:18: warning: variable 's' set but not used [-Wunused-but-set-variable]
  int a, b, y, p, s,t,j;
                  ^
/in/foo.c:3:15: warning: unused variable 'p' [-Wunused-variable]
  int a, b, y, p, s,t,j;
               ^
/in/foo.c:3:12: warning: unused variable 'y' [-Wunused-variable]
  int a, b, y, p, s,t,j;
            ^