某个公司采用公用电话传递数据，数据是四位的整数，在传递过程中是加密的，加密 规则如下：每位数字都加上 5,然后用和除以 10 的余数代替该数字，再将第一位和第四位交 换，第二位和第三位交换

package ShangKe;

import java.util.Scanner;

public class BianChen3 {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        System.out.println("请输入一个四位整数：");
        int num = input.nextInt();
        int x1,x2,x3,x4;
        x1 = num / 1000;
        x2 = num / 100 % 10;
        x3 = num / 10 % 10;
        x4 = num % 10;
        x1 = (x1 + 5)%10;
        x2 = (x2 + 5)%10;
        x3 = (x3 + 5)%10;
        x4 = (x4 + 5)%10;
        int n;
        n = x1;
        x1 = x4;
        x4 = n;
        n = x2;
        x2 = x3;
        x3 = n;
        System.out.println("加密后的数据："+x1+""+x2+""+x3+""+x4);
    }
}