作业

去超市选择购买的商品

0.开始购买

1.洗发水15元

2.牙刷5元

3.可口可乐3元

4.水杯12元

5.毛巾6元

输入商品编号，输入每种要买几件；

结算：需要列出来商品名称，单价，数量，总价及所有商品总价，结账时间，输入交给收银员的钱数，不够继续交钱，够结账找钱。

 Console.WriteLine("0.开始购买");
            //Console.WriteLine("1.洗发水      15元");
            //Console.WriteLine("2.牙刷        5元");
            //Console.WriteLine("3.可口可乐    3元");
            //Console.WriteLine("4.水杯        12元");
            //Console.WriteLine("5.毛巾        6元");
            Console.WriteLine("6.结算（退出）");

            Console.Write("请输入号码：");
            for (int i = 0; i == 0; )
            {
                int aa = int.Parse(Console.ReadLine());
                if (aa == 0)
                {
                    ArrayList al = new ArrayList();
                    int biao1 = 0;
                    for (int j = 0; j == 0; )
                    {
                        bool biaocuo = true;
                        string[] array = new string[3];
                        Console.Clear();
                        if (al.Count > 0)
                        {
                            for (int k = 0; k < al.Count; k++)
                            {
                                string[] yigou = (string[])al[k];
                                Console.WriteLine("您选择了{0}，单价为{1}元，数量为{2}。", yigou[0], yigou[1], yigou[2]);
                            }
                        }
                        Console.WriteLine("1.洗发水      15元");
                        Console.WriteLine("2.牙刷        5元");
                        Console.WriteLine("3.可口可乐    3元");
                        Console.WriteLine("4.水杯        12元");
                        Console.WriteLine("5.毛巾        6元");
                        Console.WriteLine("6.结算");

                        Console.Write("请输入选项：");
                        int aaa = int.Parse(Console.ReadLine());
                        switch (aaa)
                        {
                            case 1:
                                array[0] = "洗发水";
                                array[1] = "15";
                                biao1++;
                                Console.Write("您选择的是洗发水，请问您需要多少瓶？");
                                break;
                            case 2:
                                array[0] = "牙刷";
                                array[1] = "5";
                                biao1++;
                                Console.Write("您选择的是牙刷，请问您需要多少支？");
                                break;
                            case 3:
                                array[0] = "可口可乐";
                                array[1] = "3";
                                biao1++;
                                Console.Write("您选择的是可口可乐，请问您需要多少瓶？");
                                break;
                            case 4:
                                array[0] = "水杯";
                                array[1] = "12";
                                biao1++;
                                Console.Write("您选择的是水杯，请问您需要多少个？");
                                break;
                            case 5:
                                array[0] = "毛巾";
                                array[1] = "6";
                                biao1++;
                                Console.Write("您选择的是毛巾，请问您需要多少块？");
                                break;
                            case 6:
                                if (biao1 == 0)
                                {
                                    Console.Clear();
                                    Console.WriteLine("您什么也没有购买，您已经走出了超市。。。");
                                    j = 1;
                                    i = 1;
                                }
                                else
                                {
                                    int zong = 0;
                                    for (int k = 0; k < al.Count; k++)
                                    {
                                        string[] yigou = (string[])al[k];
                                        Console.WriteLine("您选择了{0}，单价为{1}元，数量为{2}，单品总价：{3}。", yigou[0], yigou[1], yigou[2], (int.Parse(yigou[1]) * int.Parse(yigou[2])));
                                        zong += int.Parse(yigou[1]) * int.Parse(yigou[2]);
                                    }
                                    Console.Write("总价：" + zong + "元。请缴费：");
                                    int erjiao = 0;
                                    for (int l = 0; l == 0; )
                                    {
                                        int jiao = int.Parse(Console.ReadLine());
                                        jiao += erjiao;
                                        if (jiao >= zong)
                                        {
                                            Console.WriteLine("交易成功，交易时间为：" + DateTime.Now);
                                            Console.WriteLine("找零：" + (jiao - zong) + "元。");
                                            Console.WriteLine("谢谢惠顾！再见！");
                                            l = 1;
                                            j = 1;
                                            i = 1;
                                        }
                                        else
                                        {
                                            erjiao = jiao;
                                            Console.Write("缴费金额不足，请继续缴费：");
                                        }
                                    }
                                }
                                break;
                            default:
                                Console.WriteLine("查无此商品！请按回车键继续选择商品！");
                                Console.ReadLine();
                                biaocuo = false;
                                break;
                        }
                        if (i == 0 && j == 0 && biaocuo == true)
                        {
                            array[2] = Console.ReadLine();
                            Console.WriteLine("您选择了{0}，单价为{1}元，数量为{2}。请按回车键继续购买！", array[0], array[1], array[2]);
                            al.Add(array);
                            Console.ReadLine();
                        }
                    }
                }
                else if (aa == 6)
                {
                    Console.Clear();
                    Console.WriteLine("您什么也没有购买！您已走出超市。。。");
                    i = 1;
                }
                else
                {
                    Console.Write("输入有误！请重新输入：");
                }
            }