阶乘的精确值

#include <stdio.h>
int max = 3000;
int f[3000];
int main()
{
    int i,j,n;
    scanf("%d",&n);
    f[0] = 1;
    for(i = 2;i <= n;i++)
    {
        int c = 0;
        for(j = 0;j < max;j++)
        {
            int s = f[j]*i + c;
            f[j] = s % 10;
            c = s/10;
        }
    }
    
    for(j = max-1;j >= 0;j--)
    {
        if(f[j])
            break;
    }
    
    for(i = j;i >= 0;i--)
    {
        printf("%d",f[i]);
    }
    return 0;
}

示例：

30
265252859812191058636308480000000