/// <summary>
/// 根据用户选择打折方式返回一个打折方式
/// </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(0.8);
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;
default:
break;
}
return(cal);
}
/// <summary>
/// 跟用户交互的过程
/// </summary>
public void AskBuying()
{
Console.WriteLine("欢迎光临，请问你需要些什么");
Console.WriteLine("我们有 Acer,SanSung,JiangYou,Banana");
string strType = Console.ReadLine();
Console.WriteLine("您需要多少个？");
int count = Convert.ToInt32(Console.ReadLine());
//去仓库取货
ProductFatter[] pros = ck.QuPros(strType, count);
//计算价钱
double realMoney = GetMoney(pros);
Console.WriteLine("您总共应付{0}元", realMoney);
Console.WriteLine("请选择您的打折方式：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();
//通过简单工厂设计模式 根据用户输入获得一个打折对象
CalFather cal = GetCal(input);
double totalMoney = cal.GetTotalMoney(realMoney);
Console.WriteLine("打完折后，您应付{0}元钱", totalMoney);
Console.WriteLine("以下是您的购物信息");
foreach (var item in pros)
{
Console.WriteLine("货物名称：" + item.Name + "，" + "\t" + "货物单价：" + item.Price + "，" + "\t" + "货物编号：" + item.ID);
}
}