Why does an empty declaration work for definitions with int arguments but not for float arguments?

Question

I thought the difference is that declaration doesn\'t have parameter types...

Why does this work:

int fuc();

int fuc(int i) {
  printf(         


        

Answer 1

prototype = forward declaration, so you can use it before you tell the compiler what it does. It still has parameters, however.

Useful in a lot of respects!