C18

计算1!+2!+3!+…+n!的值，n的值由键盘输入`

#include<stdio.h>
int main()
{
	int i = 1, n, sum=0, temp=1;
	printf("输入一个数\n");
	scanf("%d", &n);
	while (i <= n)
	{
		temp = temp*i;
		sum = sum + temp;
		i++;
	}
	printf("%d\n", sum);
	return 0;
}