大数阶乘的c语言代码

#include <stdio.h>
 
int main()
{
    int n, i, j, tmp, sum;
    char num[3000] = { 1 };
     
    scanf( "%d", &n );
 
    for ( i=2; i<=n; i++ )
        for ( j=0,tmp=0; j<3000; j++ )
        {
            sum = num[j]*i+tmp;
            num[j] = sum%10;
            tmp = sum/10;
        }
 
    i = 2999;
    while ( !num[i] )
        i--;
    for ( j=i; j>=0; j-- )
        printf( "%d",num[j] );
    putchar( ‘\n‘ );
 
    return 0;
}