【C语言小题】递归和非递归实现求n的阶乘

用递归和非递归分别实现求n的阶乘（不考虑溢出的问题）

# include 

long long Fac(int N)
{
	if (N <= 1)
	{
		return 1;
	}
	return Fac(N - 1) * N;
}

int main()
{
	int i = 3;
	printf("%d", Fac(i));
	return 0;
}

# include 

long long Fac(int N)
{
	long long ret = 1;
	for (int i = 2; i <= N; ++i)
	{
		ret *= i;
	}
	return ret;
}

int main()
{
	int i = 3;
	printf("%d", Fac(i));
	return 0;
}