/in/foo.c: In function 'main':
/in/foo.c:10:22: error: expected ')' before 'c'
  printf("%d,%d,%d\n" c b a);
                      ^
/in/foo.c:10:11: warning: format '%d' expects a matching 'int' argument [-Wformat=]
  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);
                 ^