计算n的阶乘

#include<stdio.h>
#include<math.h>
int main()
{
	int n;
	int ret = 1;
	scanf_s("%d", &n);
	for (int i = 1; i <= n; i++)
	{
		ret = ret * i;
	}
	printf("n的阶乘是%d\n", ret);
	return 0;
}

结果