Java练习题02

8. 给一个不多于5位的正整数，
要求：
    1.求它是几位数
    2.逆序打印出各位数字

import java.util.Scanner;

public class HomeWork08 {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int count = 0;
        String res = "";
        while(num != 0){
            count++;
            int a = num % 10;
            num /= 10;
            res += String.valueOf(a);
        }
        System.out.println(count);
        System.out.println(res);
    }
}