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。
1 Console.WriteLine("0.开始购买"); 2 //Console.WriteLine("1.洗发水 15元"); 3 //Console.WriteLine("2.牙刷 5元"); 4 //Console.WriteLine("3.可口可乐 3元"); 5 //Console.WriteLine("4.水杯 12元"); 6 //Console.WriteLine("5.毛巾 6元"); 7 Console.WriteLine("6.结算（退出）"); 8 9 Console.Write("请输入号码："); 10 for (int i = 0; i == 0; ) 11 { 12 int aa = int.Parse(Console.ReadLine()); 13 if (aa == 0) 14 { 15 ArrayList al = new ArrayList(); 16 int biao1 = 0; 17 for (int j = 0; j == 0; ) 18 { 19 bool biaocuo = true; 20 string[] array = new string[3]; 21 Console.Clear(); 22 if (al.Count > 0) 23 { 24 for (int k = 0; k < al.Count; k++) 25 { 26 string[] yigou = (string[])al[k]; 27 Console.WriteLine("您选择了{0}，单价为{1}元，数量为{2}。", yigou[0], yigou[1], yigou[2]); 28 } 29 } 30 Console.WriteLine("1.洗发水 15元"); 31 Console.WriteLine("2.牙刷 5元"); 32 Console.WriteLine("3.可口可乐 3元"); 33 Console.WriteLine("4.水杯 12元"); 34 Console.WriteLine("5.毛巾 6元"); 35 Console.WriteLine("6.结算"); 36 37 Console.Write("请输入选项："); 38 int aaa = int.Parse(Console.ReadLine()); 39 switch (aaa) 40 { 41 case 1: 42 array[0] = "洗发水"; 43 array[1] = "15"; 44 biao1++; 45 Console.Write("您选择的是洗发水，请问您需要多少瓶？"); 46 break; 47 case 2: 48 array[0] = "牙刷"; 49 array[1] = "5"; 50 biao1++; 51 Console.Write("您选择的是牙刷，请问您需要多少支？"); 52 break; 53 case 3: 54 array[0] = "可口可乐"; 55 array[1] = "3"; 56 biao1++; 57 Console.Write("您选择的是可口可乐，请问您需要多少瓶？"); 58 break; 59 case 4: 60 array[0] = "水杯"; 61 array[1] = "12"; 62 biao1++; 63 Console.Write("您选择的是水杯，请问您需要多少个？"); 64 break; 65 case 5: 66 array[0] = "毛巾"; 67 array[1] = "6"; 68 biao1++; 69 Console.Write("您选择的是毛巾，请问您需要多少块？"); 70 break; 71 case 6: 72 if (biao1 == 0) 73 { 74 Console.Clear(); 75 Console.WriteLine("您什么也没有购买，您已经走出了超市。。。"); 76 j = 1; 77 i = 1; 78 } 79 else 80 { 81 int zong = 0; 82 for (int k = 0; k < al.Count; k++) 83 { 84 string[] yigou = (string[])al[k]; 85 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]))); 86 zong += int.Parse(yigou[1]) * int.Parse(yigou[2]); 87 } 88 Console.Write("总价：" + zong + "元。请缴费："); 89 int erjiao = 0; 90 for (int l = 0; l == 0; ) 91 { 92 int jiao = int.Parse(Console.ReadLine()); 93 jiao += erjiao; 94 if (jiao >= zong) 95 { 96 Console.WriteLine("交易成功，交易时间为：" + DateTime.Now); 97 Console.WriteLine("找零：" + (jiao - zong) + "元。"); 98 Console.WriteLine("谢谢惠顾！再见！"); 99 l = 1; 100 j = 1; 101 i = 1; 102 } 103 else 104 { 105 erjiao = jiao; 106 Console.Write("缴费金额不足，请继续缴费："); 107 } 108 } 109 } 110 break; 111 default: 112 Console.WriteLine("查无此商品！请按回车键继续选择商品！"); 113 Console.ReadLine(); 114 biaocuo = false; 115 break; 116 } 117 if (i == 0 && j == 0 && biaocuo == true) 118 { 119 array[2] = Console.ReadLine(); 120 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]); 121 al.Add(array); 122 Console.ReadLine(); 123 } 124 } 125 } 126 else if (aa == 6) 127 { 128 Console.Clear(); 129 Console.WriteLine("您什么也没有购买！您已走出超市。。。"); 130 i = 1; 131 } 132 else 133 { 134 Console.Write("输入有误！请重新输入："); 135 } 136 }
