Question

int main(void) {

      int i = 0;
      scanf("%f", &i);

      return 0;
}

It is allegedly if I input a float numger, it will collapse.

I have testes it in Gcc4.7, it works.
I hava no VC6.0, so I wanna konw if it will collapse in VC6.0.

If it will, why ? I was told that because the FPU isn’t initialized ?

Answer 1

  int i = 0;
  scanf("%f", &i);

You want:

  scanf("%d", &i);

instead.

%f in scanf expects an argument of type pointer to float. Passing an argument of type pointer to int is undefined behavior.