recursive power 구현

int	ft_recursive_power(int nb, int power)
{
	int	calc;

	calc = nb;
	if (power == 0)
		return (1);
	if (power < 0)
		return (0);
	if (power > 0)
		return (calc * ft_recursive_power(nb, (power - 1)));
	return (calc);
}