import java.util.*;

public class 美味餐厅 {
    public static void main(String[] args) {
        BOSS boss = new BOSS();
        boss.eat();
    }
}

class 菜谱 {
    String name;
    double price;
    int number;
    int 点菜数;
}

class 餐厅 {
    菜谱[] cp = new 菜谱[3];

    public void initial() {
        菜谱 蒸排骨 = new 菜谱();
        蒸排骨.name = "蒸排骨";
        蒸排骨.price = 15;
        蒸排骨.number = 4;
        蒸排骨.点菜数 = 0;

        菜谱 白切鸡 = new 菜谱();
        白切鸡.name = "白切鸡";
        白切鸡.price = 15;
        白切鸡.number = 10;
        白切鸡.点菜数 = 0;

        菜谱 齿牛肉 = new 菜谱();
        齿牛肉.name = "齿牛肉";
        齿牛肉.price = 20;
        齿牛肉.number = 2;
        齿牛肉.点菜数 = 0;

        cp[0] = 蒸排骨;
        cp[1] = 白切鸡;
        cp[2] = 齿牛肉;
    }
}

class BOSS {
    餐厅 ct = new 餐厅();

    String name = "";

    public void eat() {
        ct.initial();
        功能选择();
    }

    public void 功能选择() {
        主界面();
        Scanner scn = new Scanner(System.in);
        int n = scn.nextInt();
        switch (n) {
        case 1:
            System.out.print("请输入菜名:");
            name = scn.next();
            点菜(name);
            返回主界面();
            break;
        case 2:
            查看();
            返回主界面();
            break;
        case 3:
            买单();
            返回主界面();
            break;
        case 4:
            System.out.print("欢迎下次光临!!");
            break;
        }
    }

    public void 返回主界面() {
        System.out.print("输入0返回:");
        Scanner scn = new Scanner(System.in);
        int n = scn.nextInt();
        if (n == 0) {
            功能选择();
        } else {
            System.out.print("输入异常,请重新输入:");
            返回主界面();
        }
    }

    public void 主界面() {

        System.out.println("*********欢迎来到美味餐厅**********");
        System.out.println("1、点菜");
        System.out.println("2、查看菜谱&数量");
        System.out.println("3、买单");
        System.out.println("4、退出");
        System.out.println("***********************************");
        System.out.print("请输入功能编号:");
    }

    public void 点菜(String name) {
        for (int i = 0; i < ct.cp.length; i++) {
            if (ct.cp[i] != null) {
                if (name.equals(ct.cp[i].name)) {
                    if (ct.cp[i].number > 0) {
                        ct.cp[i].number--;
                        ct.cp[i].点菜数++;
                        System.out.println("点菜成功,蒸排骨还剩" + ct.cp[i].number
                                + "份。");
                        return;
                    }
                }
            }
        }
        System.out.print("点菜失败..");
    }

    public void 查看() {
        System.out.println("菜名\t价格\t份量");
        for (int i = 0; i < ct.cp.length; i++) {
            if (ct.cp[i] != null) {
                System.out.println(ct.cp[i].name + "\t" + ct.cp[i].price + "\t"
                        + ct.cp[i].number);
            }
        }
    }

    public void 买单() {
        Scanner scn = new Scanner(System.in);
        double 菜价 = 0;
        System.out.println("您点的菜详细信息如下:");
        System.out.println("菜名\t价格\t份量");
        for (int i = 0; i < ct.cp.length; i++) {
            if (ct.cp[i].name != null) {
                if (ct.cp[i].点菜数 > 0) {
                    菜价 = ct.cp[i].price * ct.cp[i].点菜数+菜价;
                    System.out.println(ct.cp[i].name + "\t" + ct.cp[i].price
                            + "\t" + ct.cp[i].点菜数);
                    continue;
                }
            }
        }
        System.out.println("共计:" + 菜价 + "元");
        System.out.print("请输入付款金额:");
        int 付款 = scn.nextInt();
        double 找零 = 付款 - 菜价;
        System.out.println("\n应收:" + 菜价 + "元,实收" + 付款 + "元,找零:" + 找零 + "元");
    }

}