用键盘输入一位整数，当输入1~7时，显示对应的英语星期缩写。

用键盘输入一位整数，当输入1~7时，显示对应的英语星期缩写。

package com.hanyi;
//
//*2021.3.24
//*Java作业
//
import java.util.Scanner;

public class zuoye4 {
    public static void main(String[] args) {
        int num = 0;
        String bay ="";
        Scanner input =new Scanner(System.in);
        System.out.print("请输入数字1~7（输入0结束）:");
        num = input.nextInt();
        while(num!=0){
            if (num>=1& num<=7){
                switch (num){
                    case 1:
                        bay ="MON" ;
                        break;
                    case 2:
                        bay ="TUE" ;
                        break;
                    case 3:
                        bay ="WED" ;
                        break;
                    case 4:
                        bay ="THU" ;
                        break;
                    case 5:
                        bay ="FRI" ;
                        break;
                    case 6:
                        bay ="SAT" ;
                        break;
                    case 7:
                        bay ="SUN" ;
                        break;
                }
                System.out.println("今天是"+bay);
                System.out.println("请输入数字1~7（输入0时结束）:");
                num = input.nextInt();
            }else {
                System.out.print("输入的数字非法，请重新输入:");
                num = input.nextInt();
            }
        }
        System.out.println("程序结束！");
    }
}