java程序 模拟肯德基卖餐问题，可以单点，也可以点套餐

好的，我可以给你提供一个简单的 Java 程序模拟肯德基卖餐问题。首先，我们需要定义餐品和套餐的类：

class Food {
    private String name;
    private double price;

    public Food(String name, double price) {
        this.name = name;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }
}

class Combo {
    private String name;
    private Food mainDish;
    private Food sideDish;
    private double price;

    public Combo(String name, Food mainDish, Food sideDish, double price) {
        this.name = name;
        this.mainDish = mainDish;
        this.sideDish = sideDish;
        this.price = price;
    }

    public String getName() {
        return name;
    }

    public double getPrice() {
        return price;
    }

    public String getMainDishName() {
        return mainDish.getName();
    }

    public String getSideDishName() {
        return sideDish.getName();
    }
}

然后，我们需要定义一个菜单类，用于存储餐品和套餐：

import java.util.ArrayList;
import java.util.List;

class Menu {
    private List<Food> foods;
    private List<Combo> combos;

    public Menu() {
        foods = new ArrayList<>();
        combos = new ArrayList<>();
    }

    public void addFood(Food food) {
        foods.add(food);
    }

    public void addCombo(Combo combo) {
        combos.add(combo);
    }

    public List<Food> getFoods() {
        return foods;
    }

    public List<Combo> getCombos() {
        return combos;
    }
}

接下来，我们需要定义一个订单类，用于存储客户点的餐品和套餐：

import java.util.ArrayList;
import java.util.List;

class Order {
    private List<Food> foods;
    private List<Combo> combos;

    public Order() {
        foods = new ArrayList<>();
        combos = new ArrayList<>();
    }

    public void addFood(Food food) {
        foods.add(food);
    }

    public void addCombo(Combo combo) {
        combos.add(combo);
    }

    public List<Food> getFoods() {
        return foods;
    }

    public List<Combo> getCombos() {
        return combos;
    }

    public double getTotalPrice() {
        double totalPrice = 0;
        for (Food food : foods) {
            totalPrice += food.getPrice();
        }
        for (Combo combo : combos) {
            totalPrice += combo.getPrice();
        }
        return totalPrice;
    }
}

最后，我们需要定义一个主程序类，用于模拟点餐流程：

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        // 初始化菜单
        Menu menu = new Menu();
        Food burger = new Food("汉堡", 15.0);
        Food fries = new Food("薯条", 8.0);
        Food cola = new Food("可乐", 6.0);
        Combo combo1 = new Combo("套餐1", burger, fries, 20.0);
        Combo combo2 = new Combo("套餐2", burger, cola, 18.0);
        menu.addFood(burger);
        menu.addFood(fries);
        menu.addFood(cola);
        menu.addCombo(combo1);
        menu.addCombo(combo2);

        // 开始点餐
        Scanner scanner = new Scanner(System.in);
        Order order = new Order();
        boolean isOrdering = true;
        while (isOrdering) {
            System.out.println("请问您需要点什么？");
            System.out.println("1. 汉堡 （15 元）");
            System.out.println("2. 薯条 （8 元）");
            System.out.println("3. 可乐 （6 元）");
            System.out.println("4. 套餐1 （汉堡 + 薯条 + 饮料，20 元）");
            System.out.println("5. 套餐2 （汉堡 + 饮料，18 元）");
            System.out.println("6. 结算并退出");
            int choice = scanner.nextInt();
            switch (choice) {
                case 1:
                    order.addFood(burger);
                    System.out.println("已加入汉堡");
                    break;
                case 2:
                    order.addFood(fries);
                    System.out.println("已加入薯条");
                    break;
                case 3:
                    order.addFood(cola);
                    System.out.println("已加入可乐");
                    break;
                case 4:
                    order.addCombo(combo1);
                    System.out.println("已加入套餐1：汉堡 + 薯条 + 饮料");
                    break;
                case 5:
                    order.addCombo(combo2);
                    System.out.println("已加入套餐2：汉堡 + 饮料");
                    break;
                case 6:
                    isOrdering = false;
                    break;
                default:
                    System.out.println("无效的选项");
                    break;
            }
        }

        // 输出订单详情和总价
        System.out.println("您的订单详情：");
        for (Food food : order.getFoods()) {
            System.out.println(food.getName() + " （单价：" + food.getPrice() + " 元）");
        }
        for (Combo combo : order.getCombos()) {
            System.out.println(combo.getName() + " （套餐包含：" + combo.getMainDishName() + "、" + combo.getSideDishName() + "、饮料；套餐价：" + combo.getPrice() + " 元）");
        }
        System.out.println("总价：" + order.getTotalPrice() + " 元。谢谢惠顾！");
    }
}

这个程序会先初始化一个菜单，然后进入点餐流程。在点餐流程中，用户可以选择单点餐品或者点套餐，并且可以多次选择。当用户选择结算并退出时，程序会输出订单详情和总价。以上代码仅供参考，你可以根据自己的需求进行修改。