题解 | #反向输出一个四位数#

import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int[] result = new int[4];
        result[0] = num % 10;
        result[1] = num / 10 % 10;
        result[2] = num / 100 % 10;
        result[3] = num / 1000;
        for(int i = 0; i < 4; i++){
            System.out.print(result[i]);
        }
    }
}