【Java案例】超市购物

迈不过友情╰ 2024-03-30 01:28 32阅读 0赞

**案例介绍：**

编写一个超市购物程序，在一家超市有牙刷、毛巾、水杯、苹果和香蕉五种商品，用户输入商品序列号进行商品购买，用户输入购买数量后计算出所需要花费的钱，一次购买结束后，需要用户输入“Y”或“N”，“Y”代表继续购买，“N”代表购物结束，此时需要计算并输出本次购物的总计花费的钱。商品价格如下表所示。

![2cd76fc604d94c30ba683ddccb72f2e5.png][]

![38ba90435a6b44cdb1762e5d52f5d06a.png][]

**运行结果：**

![d7df779132704679a0ae5c3161dd5ba6.png][]

**完整代码：**

import java.util.Scanner;
    
    public class supermarket {
        public static void main(String[] args)
        {
            Scanner scanner = new Scanner(System.in);
            double toothbrush = 8.8;//牙刷
            double towel = 10;//毛巾
            double cup = 18.8;//水杯
            double apple = 12.5;//苹果
            double banana =15.5;//香蕉
            System.out.println("------------黑马小商城------------");
            System.out.println("1.牙刷的价格为："+toothbrush+"元");
            System.out.println("2.毛巾的价格为："+towel+"元");
            System.out.println("3.水杯的价格为："+cup+"元");
            System.out.println("4.苹果的价格为："+apple+"元");
            System.out.println("5.香蕉的价格为："+banana+"元");
            System.out.println("--------------------------------");
            int item;//购买商品序列号
            int count;//购买商品的数量
            double total = 0;//购买商品总金额
            String good = "商品名";
            String goods = "商品量词";
            double price = 0;
            String choice = "Y";
            do{
                System.out.print("请输入您需要购买商品的序列号：");
                item = scanner.nextInt();
                switch (item)
                {   //将序列号对应的商品名、商品量词、商品价格分别赋值给good、goods、price
                    case 1: good = "牙刷";    goods = "把";    price = toothbrush; break;
                    case 2: good = "毛巾";    goods = "条";    price = towel;      break;
                    case 3: good = "水杯";    goods = "个";    price = cup;        break;
                    case 4: good = "苹果";    goods = "斤";    price = apple;      break;
                    case 5: good = "香蕉";    goods = "斤";    price =banana;      break;
                    default:
                        item=0;//若序列号输入错误，将item赋值为0
                        System.out.println("---------商品序列号输入错误---------");
                }
                if(item!=0) //序列号输入正确，执行if语句
                {   
                    System.out.print("请输入您需要购买" + good + "的数量：");
                    count = scanner.nextInt();
                    total = total + count * price;
                    System.out.println("您购买了" + good + count + goods + "，需要花费" + count * price + "元");
                }
                System.out.print("需要继续购买请输入Y，否则输入N：");
                choice = scanner.next();
                
                while(!choice.equals("Y")&&!choice.equals("N"))//若输入字母不为Y或N，则进入while循环
                {
                    System.out.println("--------是否继续购买识别失败--------");
                    System.out.print("需要继续购买请输入Y，否则输入N：");
                    choice = scanner.next();
                }//输入"Y"循环继续，输入"N"循环退出
            }while(choice.equals("Y"));
            System.out.println("您本次购物共花费 "+total+" 元");
            System.out.println("期待您的下次光临！");
        }
    }

[2cd76fc604d94c30ba683ddccb72f2e5.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/4aa4aa0567254740839c7e69a96276b0.png
[38ba90435a6b44cdb1762e5d52f5d06a.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/a4b35075382d4517974085e86c14659a.png
[d7df779132704679a0ae5c3161dd5ba6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/30/c89f466cec814257900796002a966d99.png