package homework;

import java.util.Random;

import java.util.Scanner;

public class Menu {

	public static void main(String[] args) {

		mainMenu();

	}

	public static void mainMenu() {

		Scanner input = new Scanner(System.in);

		System.out.println("****************");

		System.out.println("   1. 登录");

		System.out.println("   2. 注册");

		System.out.println("   3.幸运抽奖");

		System.out.println("   4.看小故事");

		System.out.println("   5.退出系统");

		System.out.println("****************");

		System.out.print("请选择:");

		int i = input.nextInt();

		switch (i) {

		case 1:

			login();

			break;

		case 2:

			register();

			break;

		case 3:

			luck();

			break;

		case 4:

			story();

			break;

		case 5:

			exit();

			break;

		default:

			System.out.println("该系统暂未开放其它功能！");

			break;

		}

	}

	private static void login() {

		// TODO Auto-generated method stub

		Scanner input = new Scanner(System.in);

		System.out.print("请输入您的用户名：");

		String uname = input.next();

		System.out.print("请输入您的密码：");

		String upwd = input.next();

		if (uname.equals("zs") && upwd.equals("123")) {

			System.out.println("登录成功!");

		} else {

			System.out.println("登录失败");

		}

		returnMain();

	}

	public static void returnMain() {

		System.out.println("是否返回主菜单?Y/N");

		Scanner input = new Scanner(System.in);

		if (input.next().equalsIgnoreCase("Y")) {

			mainMenu();

		} else {

			System.out.println("谢谢使用");

		}

	}

	public static void register() {

		Scanner input = new Scanner(System.in);

		System.out.print("请输入您的用户名:");

		String uname = input.next();

		System.out.print("请输入您的密码：");

		String upwd = input.next();

		System.out.println("您的账号已注册成功！！！");

		returnMain();

	}

	public static void luck() {

		System.out.println("**************************************欢迎来到幸运抽奖界面！*************************************");

		System.out.println(" *******规则为：如果您输入的四位会员卡号的百位等于系统随机数,您将成为我们的幸运会员,否则不是*******");

		Scanner input = new Scanner(System.in);

		int temp = 0;

		for (int i = 0;; i++) {

			System.out.print("请您输入四位的会员卡号：");

			int vipcard = input.nextInt();

			int bai = vipcard % 1000 / 100;

			temp = bai;

			if (vipcard < 999 || vipcard > 9999) {

				System.out.println("您的会员卡号错误,请您重新输入！");

			} else {

				break;

			}

		}

		Random r = new Random();

		int num = r.nextInt(9);

		System.out.println("系统生成的百位随机数为：" + num);

		if (num == temp) {

			System.out.println("恭喜您,成为我们的幸运会员！");

		} else {

			System.out.println("很遗憾,谢谢您的参与！");

		}

		returnMain();

	}

	public static void story() {

		System.out.println("欢迎您来到小故事界面,请您输入相应的数字(1-3)进行观看！");

		for (int i = 0;; i++) {

			Scanner input = new Scanner(System.in);

			int num = input.nextInt();

			switch (num) {

			case 1:

				System.out.println("男儿事业多，何必学读书 —— 宋 · 张耒《阿几》");

				break;

			case 2:

				System.out.println("阿爷无大儿，木兰无长兄，愿为市鞍马，从此替爷征 —— 南北朝 · 佚名《木兰诗 / 木兰辞》");

				break;

			case 3:

				System.out.println("大儿荷锸去疏麻，小儿提筐来采茶，翁自決水灌秧芽 —— 宋 · 艾性夫《田家词》");

				break;

			default:

				System.out.println("您的输入有错,请重新输入！");

			}

			break;

		}

		returnMain();

	}

	public static void exit() {

		System.out.println("是否退出该系统?Y/N");

		Scanner input = new Scanner(System.in);

		if (input.next().equalsIgnoreCase("N")) {

			mainMenu();

		} else {

			System.out.println("您已退出我们的系统,谢谢使用!");

		}

	}

}

	public static int Jc(int n) {

		int cj=1;

		for (int i = 1; i <= n; i++) {

			cj*=i;

		}

		return cj;

	}

	public static void main(String[] args) {

		System.out.println(Jc(5));

	}

	public static void Year(int n) {

		if (n % 4 == 0 && n % 100 != 0 || n % 400 == 0) {

			System.out.println(n + "是闰年");

		} else {

			System.out.println(n + "是平年");

		}

	}

	public static void main(String[] args) {

		Year y = new Year();

		Year(2020);

	}