（二维数组）点餐

import java.util.Arrays;
import java.util.Scanner;

/**
 * @Author：Zxb
 * @Version：1.0
 * @Date：2022/11/15-18:59
 * @Since：jdk1.8
 * @Description：
 */
public class Exercise1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        //使用二维数组初始化菜单列表
        String[][] menus = {
                {"鱼香肉丝", "20", "微辣"},
                {"红烧鱼", "30", "特辣"},
                {"糖醋里脊", "25"},
                {"酸辣土豆丝", "18"},
                {"醋溜白菜", "15"},
                {"红烧牛肉面", "16"}
        };
        //购物车
        String[][] car = new String[0][];

        boolean b = true;
        while (b) {
            System.out.println("*****************欢迎使用XXX点餐系统*******************");
            System.out.println("\t\t1、显示所有菜单");
            System.out.println("\t\t2、点餐（加入到购物车）");
            System.out.println("\t\t3、显示购物车");
            System.out.println("\t\t0、退出系统");
            System.out.println("请选择：");
            int choose = scanner.nextInt();

            switch (choose) {
                case 1:
                    System.out.println("点餐系统>>>显示菜单列表");
                    for (String[] menu : menus) {
                        System.out.println(Arrays.toString(menu));
                    }
                    break;
                case 2:
                    System.out.println("点餐系统>>>点餐");
                    while(b){
                        System.out.println("请输入点餐名称：");
                        String inputName = scanner.next();
                        //根据名称查找一道菜
                        String[] buyMenu = null;
                        for (String[] menu : menus) {
                            if (inputName.equals(menu[0])) {
                                buyMenu = menu;
                            }
                        }
//                    int index = -1;
//                    for (int i = 0; i < menus.length; i++) {
//                        String [] menu = menus[i];
//                        if(inputName.equals(menu[0])){
//                            index = i;
//                        }
//                    }
                        //先判断
                        if (buyMenu == null) {
                            System.out.println("[点餐失败，该菜品是不存在！]");
                        } else {
                            //先扩容
                            car = Arrays.copyOf(car, car.length + 1);
                            //将点的菜加入到购物车、
                            car[car.length - 1] = buyMenu;
                            System.out.println("[点餐成功，已将<" + buyMenu[0] + ">菜加入购物车。价格为<" + buyMenu[1] + ">]");
                        }
                        System.out.println("是否继续点餐？y/n");
                        String input=scanner.next();
                        if("n".equals(input)||"N".equals(input)){
                            break;
                        }
                    }
                    break;
                case 3:
                    System.out.println("点餐系统>>>显示购物车");
                    if (car.length == 0) {
                        System.out.println("[你还未添加任何商品！]");
                    } else {
                        int pay = 0;
                        for (String[] strings : car) {
                            System.out.println(Arrays.toString(strings));
                            //计算价格：将字符串转成int类型！
                            int price = Integer.parseInt(strings[1]);
                            pay += price;
                        }
                        System.out.println("需支付<" + pay + ">元！");
                    }
                    break;
                case 0:
                    System.out.println("[谢谢使用，系统已退出！]");
                    b = false;
                    break;
            }
        }
    }
}