找一个数阶乘后0的个数

package com.lcc;

import java.util.Scanner;

public class zk33 {
    public static void main(String[] args) {
        System.out.print("数入你要阶乘的数字: ");
        Scanner scanner = new Scanner(System.in);
        int num = scanner.nextInt();
        int tmp = 1;
        for (int i = 1; i <=num ; i++) {
            tmp*=i;
        }
        String s1 = tmp+"";
        System.out.println(s1);
        char[] chars = s1.toCharArray();
        int time=0;
        for (int i = 0; i <chars.length ; i++) {
            if (chars[i]=='0'){
                time++;
            }
        }
        System.out.println("0的个数有 "+time+"个");
    }
}