输出星期数

import java.util.*;
public class Demo11 {
    static Scanner sr = new Scanner(System.in);

    public static void main(String[] args) {
          int num = 0;
          do{
              System.out.println("请输入1-7之间的数字，输入0则退出程序：");
              num = sr.nextInt();
              //判断输入的数字是否在1-7的范围内
              if(num<0 || num>7){
                  System.out.println("你输入的数字不合格，请重新输入");
                  continue;
              }
              switch(num){
                  case 1:
                      System.out.println("星期一");
                      break;
                  case 2:
                      System.out.println("星期二");
                      break;
                  case 3:
                      System.out.println("星期三");
                      break;
                  case 4:
                      System.out.println("星期四");
                      break;
                  case 5:
                      System.out.println("星期五");
                      break;
                  case 6:
                      System.out.println("星期六");
                      break;
                  case 7:
                      System.out.println("星期天");
                      break;
              }
          }while (num!=0);
          System.out.println("程序结束");
    }
}