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;
}