Java練習題——點餐系統

點餐系統

場景：注冊多個使用者，使用者登入點餐系統進行點餐，點餐結束，結賬扣減使用者錢包餘額

對象：

餐廳（名字，菜品數組，就餐人員，就餐選擇的菜品數組）【歡迎，點菜，結賬，走人】

菜（菜名，價錢）

人（姓名，錢包餘額）

運作類：提示功能：注冊，登入（上一步，進入餐廳），退出系統

代碼

//主類（運作類）
package com.fish.www.ordering;

import java.util.Scanner;

public class OrderingSystem {

    static String[] userName = new String[50];
    static String[] userPassword = new String[50];
    static int register = 0;//登記是否登入了系統

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        People people = new People();
        Food food = new Food();
        menu(scanner);
        Restaurant restaurant = new Restaurant();
        restaurant.menu(food);
        restaurant.order(scanner,food);
        people.name = userName[register];
        people.speak(restaurant,food,scanner);
        people.leave();
        checkOut(scanner,people,restaurant);
    }

    //主界面
    public static void menu(Scanner scanner) {
        System.out.println("------->  歡迎來到X的餐廳  <-------");
        System.out.println("   ---->1.注冊\n     -->2.登入");
        System.out.println("請輸入你的選擇:");
        if (scanner.nextInt() == 1) {
            register(scanner);
        } else {
            System.out.println("沒有使用者，重新開始!\n\n\n-----------------");
            menu(scanner);
        }
    }

    //注冊界面
    public static void register(Scanner scanner) {
        System.out.println("\n\n-----------------\n開始注冊");
        for (int i = 0; i < userName.length; i++) {
            System.out.print("請輸入姓名:");
            userName[i] = scanner.next();
            System.out.print("請輸入密碼:");
            userPassword[i] = scanner.next();
            System.out.println("是否繼續輸入:");
            if (scanner.nextInt() != 1) {
                break;
            }
        }
        System.out.println("選擇:\n1.上一步\n2.進入餐廳");
        if (scanner.nextInt() == 1) {
            register(scanner);
        } else {
            signIn(scanner);
        }
    }

    //登入判斷
    public static void signIn(Scanner scanner) {
        System.out.println("\n\n-----------------\n開始登入");
        System.out.print("請輸入姓名:");
        String user = scanner.next();
        System.out.print("請輸入密碼:");
        String password = scanner.next();
        for (int i = 0; i < userName.length; i++) {
            if (userName[i].equals(user) && userPassword[i].equals(password)) {
                register = i;
                System.out.print("登入成功!");
                break;
            }
            if (i == userName.length - 1) {
                System.out.println("輸入錯誤！重新登入!\n-------------------\n");
                signIn(scanner);
            }
        }
    }

    //結賬走人
    public static void checkOut(Scanner scanner,People people,Restaurant restaurant){
        System.out.println(userName[register]+"您好，您今晚的消費為："+restaurant.sumPrice);
        System.out.println("請選擇支付方式:1\n1.支付寶\n2.微信\n");
        if (scanner.nextInt()==1){
            people.assetsAlipay = people.assetsAlipay - restaurant.sumPrice;
            System.out.println("支付成功!\n餘額為:"+people.assetsAlipay);
        }else {
            people.assetsWeChat = people.assetsWeChat - restaurant.sumPrice;
            System.out.println("支付成功!\n餘額為:"+people.assetsWeChat);
        }
    }
}

           

//餐廳類

package com.fish.www.ordering;

import java.util.Scanner;

public class Restaurant {
    /**
     * 餐廳（名字，菜品數組，就餐人員，就餐選擇的菜品數組）【歡迎，點菜，結賬，走人】
     */
    String restaurantName = "肥仔快樂餐廳";
    String[] userFood = new String[500];
    float sumPrice = 0;

    public Restaurant() {
        System.out.println("歡迎來到" + restaurantName);
    }


    //菜單
    public void menu(Food food) {
        System.out.println("開始點餐:");
        for (int i = 0; i < food.foodMenu.length; i++) {
            System.out.println((i + 1) + "." + food.foodMenu[i] + "\t" + food.foodPrice[i] + "元");
        }
    }

    //點餐
    public void order(Scanner scanner, Food food) {
        for (int i = 0; i < userFood.length; i++) {
            System.out.println("請輸入你的選擇:");
            int userChose = scanner.nextInt() - 1;
            if (userChose < 9 && userChose >= 0) {
                sumPrice = sumPrice + food.foodPrice[userChose];
                userFood[i] = food.foodMenu[userChose];
                System.out.println("你選擇了:" + food.foodMenu[userChose] + "\n目前消費：" + sumPrice);
            } else if (userChose == 9) {
                break;
            } else {
                System.out.println("沒有我喜歡的，走了");
                break;
            }
        }
    }

}

           

//食物與人
package com.fish.www.ordering;

public class Food {
    /**
     * 菜（菜名，價錢）
     */
    String[] foodMenu = new String[]{"霸王蟹", "石斑魚", "羊肉串", "牛肉串", "烤全羊", "白斬雞", "檸檬鴨", "可樂", "雪碧", "結束", "直接走人"};
    int[] foodPrice = new int[]{25, 26, 3, 5, 1000, 35, 40, 6, 6, 0, 0};
}


package com.fish.www.ordering;

import java.util.Random;
import java.util.Scanner;

public class People {
    /**
     * 人（姓名，錢包餘額）
     */
    String name;
    int assetsWeChat;
    int assetsAlipay;

    public People() {
        Random random = new Random();
        this.assetsWeChat = this.assetsAlipay = random.nextInt(10000000) + 500000;
    }

    public void speak(Restaurant restaurant, Food food, Scanner scanner) {
        System.out.println("服務員，我加餐。");
        restaurant.order(scanner, food);
    }

    public void leave(){
        System.out.println("服務員，結賬!");
    }
}

           

運作截圖

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