/// <summary> /// 根据用户的选择打折的方式返回一个打折对象 /// </summary> /// <param name="input">用户的选择</param> /// <returns>返回的父类对象 但是里面装的是子类对象</returns> public CalFather GetCal(string input) { CalFather cal = null; switch (input) { case "1": cal = new CalNormal(); break; case "2": cal = new CalRate(0.9); break; case "3": cal = new CalRate(0.85); break; case "4": cal = new CalMN(300, 50); break; case "5": cal = new CalMN(500, 100); break; } return(cal); }
/// <summary> /// 跟用户交互的过程 /// </summary> public void AskBuying() { Console.WriteLine("欢迎光临,请问您需要些什么?"); Console.WriteLine("我们有Acer,Samsung,JiangYou,Banana"); string StrType = Console.ReadLine(); Console.WriteLine("您需要多少?"); int count = Convert.ToInt32(Console.ReadLine()); //去仓库去货物 ProductFather[] pros = ck.QuPros(StrType, count); //下面该计算价钱了 double realMoney = GetMoney(pros); Console.WriteLine("您总共应付{0}元", realMoney); Console.WriteLine("请选择你的打折方式1---不打折 2---打九折 3---打85折 4---买300送50 5---买500送100"); string input = Console.ReadLine(); //通过简单工厂的设计模式根据用户的舒服获得一个打折对象 CalFather cal = GetCal(input); double totalMoney = cal.GetTotalMoney(realMoney); Console.WriteLine("打完针后,您应付{0}元", totalMoney); }