package com.foreknow.test;

import java.util.Scanner;

public class LoginDemo {

public static void main(String[] args) {
    int meu = 0;//定义switch  case菜单语句
    Scanner input = new Scanner(System.in);
    String answer ="y"; //定义程序是否向下继续执行  y继续执行   n 结束程序
    
    String admin ="";  // 声明用户名
    String password =""; // 声明密码
    do {
        
        System.out.println("----欢迎进入本系统----");
        System.out.println("    1.注册");
        System.out.println("    2.登录");
        System.out.println("    3.抽奖");
        System.out.println("-------------------------");
        System.out.println("请选择菜单：");
        meu = input.nextInt();
        switch (meu) {
        case 1:
            
            System.out.println("欢迎注册");
            System.out.println("请填写注册信息：");
            System.out.println("请输入用户名：");
            admin = input.next();
            System.out.println("请输入密码");
            password = input.next();
            int a = (int)(Math.random()*(9999-1000+1))+1000;//产生1000-9999的随机数
            System.out.println("");
            System.out.println("注册成功，请记好您的会员卡号");
            System.out.println("用户名\t密码\t会员卡号");
            System.out.println(admin+"\t"+password+"\t"+a);
            break;
        case 2:
            String yanzhengadmin = ""; //验证用户名
            String yanzhengpassword = "";  // 验证密码
            System.out.println("欢迎登陆");
            for (int i = 0; i < 3;) {
                System.out.println("请输入用户名：");
                yanzhengadmin= input.next();
                System.out.println("请输入密码：");
                yanzhengpassword = input.next();
                if (yanzhengadmin.equals(admin)&&yanzhengpassword.equals(password)) {
                    System.out.println("欢迎您："+admin);
                    break;
                }else {
                    System.out.println("用户名密码不匹配，您最多拥有三次机会，本次为第"+(++i)+"次");

                }   
            }
            
            break;
        case 3:

            break;

        default:
            System.out.println("error");
            break;
        }
        System.out.println("是否继续？(y/n)");
        answer = input.next();
    } while (answer.equals("y"));
    System.out.println("系统退出，欢迎使用！！！");
}

}