gwj / po_oopc · Files

#include <stdio.h>

int *
f1 (int *a, const int *b)
{
  *a += *b;
  return a;
}

int *
f2 (int *a, const int *b)
{
  *a -= *b;
  return a;
}

int *(*fun (int s)) (int *, const int *)
{
  if (s == 1)
    return f1;
  else
    return f2;
}

int
main ()
{
  int *(*(*fp2) (int)) (int *, const int *) = fun;

  int a = 15;
  int b = 32;
  fp2 (1) (&a, &b);
  fp2 (2) (&b, &a);
  printf ("%d %d\n", a, b);
  return 0;
}