C 数组模拟阶乘运算

#include <stdio.h>

void rdump(int arr[],int len)
{
    int i = ;
    for(i=len-;i >= ; --i)
    {
        printf("%d",arr[i]);
    }
    printf("\n");
}

void trailingZeroes(int n) {
    int arr[] = {},len = ,i = ,j = ,c = ,d = ;
    for(i=; i <= n; ++i)
    {
        for(j = ; j < len; ++j)
        {
            d = arr[j] * i + c;
            arr[j] = d % ;
            c = d / ;
        }
        for(; c > ; c /= )
        {
            arr[len++] = c % ;
        }
    }
    rdump(arr,len);
}

int main()
{
    int n = ;
    while()
    {
        scanf("%d",&n);
        trailingZeroes(n);
    }
    return ;
}