import javax.swing.*;
import java.util.Scanner;
public class demo1 {
public static void main(String[] args) {
String answer = "y"; //标识是否继续
String userName = ""; //用户名
String password = ""; // 密码
int cardNumber = 0; //卡号
boolean isRegister = false; //标识是否注册
int max = 9999;
int min = 1000;
Scanner input = new Scanner(System.in);
do {
System.out.println("******欢迎进入奖客富翁系统*****");
System.out.println("\t1.注册");
System.out.println("\t2.登录");
System.out.println("\t3.抽奖");
System.out.println("************");
int choice = input.nextInt();
switch(choice){
case 1:
System.out.println("[奖客富翁系统 > 注册]");
System.out.println("请填写个人信息：");
System.out.println("用户名：");
userName = input.next();
System.out.println("密码：");
password = input.next();
// 获取4位随机数作为卡号
cardNumber = (int) (Math.random() * (max - min)) + min;
System.out.println("\n注册成功，请记好您的会员卡号");
System.out.println("用户名\n密码\t会员卡号");
System.out.println(userName+"\t"+ password + "\t" + cardNumber);
isRegister = true; //注册成功，标志位设置为true
break;
case 2:
System.out.println("[奖客富翁系统 > 登录]");
break;
case 3:
System.out.println("[奖客富翁系统 > 抽奖]");
break;
default:
System.out.println("[您的输入有误！]");
break;
}
System.out.println("继续吗？(y/n)");
answer = input.next();
System.out.println("");
} while("y".equals(answer));
if ( "n".equals(answer)){
System.out.println("系统退出，谢谢使用！");
}
}
} //√