对象数组的使用

1、 对象数组的使用 题目要求：实现超市购物结算并输出购物小票功能。首先显示所有商品信息，然后输入购物的商品编号和数量进行购物结算，最后输出购物小票。程序运行结果如图4.12所示。要求如下：商品单价显示为两位小数，商品的小计和总计显示为货币形式，保留两位小数购物小票的四列均为左对齐，商品名称列宽度为8，后三列宽度为4参考代码：商品类： / <summary> / 商品类 / </summary> class Goods int _id; / <summary> / 商品编号 / </summary> public int Id get return

2、_id; set _id = value; string _name; / <summary> / 商品名称 / </summary> public string Name get return _name; set _name = value; double _price; / <summary> / 商品价格 / </summary> public double Price get return _price; set _price = value; 购物类： / <summary> / 购物类 / </summary>

3、; class Shopping string _list; Goods goodsList; / <summary> / 初始化商品信息 / </summary> private void Initial() this.goodsList = new Goods3; this.goodsList0 = new Goods(); this.goodsList0.Name = "农夫山泉" this.goodsList0.Price = 1.025; this.goodsList1 = new Goods(); this.goodsList1.Name

4、 = "今麦郎碗面" this.goodsList1.Price = 3.5; this.goodsList2 = new Goods(); this.goodsList2.Name = "双汇火腿肠" this.goodsList2.Price = 12.6; / <summary> / 显示商品信息 / </summary> private void ShowGoodsInfo() Console.WriteLine("0,-4t1,-8t2:0.00","编号","商品名称&

5、quot;,"单价"); for (int i = 0; i < this.goodsList.Length; i+) Console.WriteLine("0,-4t1,-8t2:0.00", i + 1, this.goodsListi.Name, this.goodsListi.Price); / <summary> / 打印购物小票 / </summary> public void PrintList() this.Initial(); / 初始化商品信息 this.ShowGoodsInfo(); / 显示商品信息

6、 double sum = 0; / 购物金额 this._list = "nn-欢迎光临光辉超市-" this._list = string.Format("0n1,-8t2,-4:F2t3,-4t4,-4:F2", this._list, "商品名称", "单价", "数量", "小计"); do Console.Write("n输入商品编号："); int num = int.Parse(Console.ReadLine(); if (num >

7、; 3 | num < 1) Console.WriteLine("请重新选择商品编号！"); continue; Console.Write("输入购买数量："); int amount = int.Parse(Console.ReadLine(); / 添加购物信息到购物小票 this._list = string.Format("0n1,-8t2,-4:F2t3,-4t4,-4:C2", this._list, this.goodsListnum - 1.Name, this.goodsListnum - 1.Price, amount, this.goodsListnum - 1.Price * amount); / 计算购物总额 sum += this.goodsListnum - 1.Price * amount; Console.Write("输入e停止购物，输入其他任意键继续购物："); if (Console.ReadLine() = "e") break; while (true); / 添加购物总额到购物小票 this._list = string.Format(&qu