/in/foo.c: In function 'main':
/in/foo.c:13:11: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int *' [-Wformat=]
  printf("%d %d %d\n",&a,&b,&c);
           ^
/in/foo.c:13:14: warning: format '%d' expects argument of type 'int', but argument 3 has type 'int *' [-Wformat=]
  printf("%d %d %d\n",&a,&b,&c);
              ^
/in/foo.c:13:17: warning: format '%d' expects argument of type 'int', but argument 4 has type 'int *' [-Wformat=]
  printf("%d %d %d\n",&a,&b,&c);
                 ^