int             my_factorielle_it(int nb)
{
  unsigned long result;

  result = 1;
  if (nb < 0)
    result = 0;
  while (nb > 1)
  {
    if (result * nb > 0xffffffff)
      return 0;
    result = result * nb;
    nb = nb - 1;
  }
  return (result);
}