1到20的阶乘和数据过大所以要求用double(题目给的),但用double输出出来的结果跟正确答案差了25,尝试了多种方法也不行,甚至直接给结果+25输出出来的还是原来的结果
#include<stdio.h>
int main()
{
int i, n;
double j, h;
scanf("%d", &n);
j = 1;
h = 0;
for (i = 1;i <= n;i++)
{
j = i * j;
h = h + j;
}
printf("%.lf\n", h);
return 0;
}
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/06147572954614.png "#left")
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/999975729546118.png "#left")