整数太大数据输出不对怎么办

Question

#include<stdio.h>
#define N 1
#define M 20

int main()
{
int Sn, i;
long long int Add = 0;

long long int Number[M] = {N};
for(i = 1; i < M; i++)
    Number[i] =(long long int) Number[i-1] * (i + 1);

scanf("%d", &Sn);

for(i = 0; i < Sn; i++)
    Add += Number[i];

printf("%d",Add);

return 0;

}

Answer 1

long long int Number[M] = {N};只是将第一个元素设置为N，后面的全是0
printf("%d",Add); long long int类型输出用%lld

如果还是不够，那就用double类型