/in/foo.c: In function 'main':
/in/foo.c:10:24: error: expected ')' before 'b'
  printf("%d %d %d\n",c b a);
                        ^
/in/foo.c:10:14: warning: format '%d' expects a matching 'int' argument [-Wformat=]
  printf("%d %d %d\n",c b a);
              ^
/in/foo.c:10:17: warning: format '%d' expects a matching 'int' argument [-Wformat=]
  printf("%d %d %d\n",c b a);
                 ^