根据用户输入输出周几，输入0退出

ublic static void main(String[] args) {
        // TODO Auto-generated method stub

        Scanner input = new Scanner(System.in);
        while (true) {
            System.out.println("输入1-7");
            int day = input.nextInt();
            if (day == 0) {
                System.out.println("程序结束");
                break;
            }
            switch (day) {
            case 1:
                System.out.println("今天是周1");
                break;
            case 2:
                System.out.println("今天是周2");
                break;
            case 3:
                System.out.println("今天是周3");
                break;
            case 4:
                System.out.println("今天是周4");
                break;
            case 5:
                System.out.println("今天是周5");
                break;
            case 6:
                System.out.println("今天是周6");
                break;
            case 7:
                System.out.println("今天是周7");
                break;
            default:
                System.out.println("输入错误");
                break;

            }
        }
    }