//简单工厂，根据输入的参数，返回一个父类对象。父类对象中装的是子类对象。
//参数:优惠的选项
//返回值：打折类的父类
public CalFather CalMoney(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;
default:
break;
}
return(cal);
}
public void AskBuying()
{
Console.WriteLine("请问您要买什么吗？");
Console.WriteLine("我们这里有Acer,Samsung,Banana,JiangYou");
string strType = Console.ReadLine();
Console.WriteLine("需要多少？");
int count = Convert.ToInt32(Console.ReadLine());
//去仓库取货
ProductFather[] pros = ck.QuHuo(strType, count);
//计算货物的价钱
double realMoney = GetMoney(pros);
Console.WriteLine("你实际应付{0}", realMoney);
//打折信息
Console.WriteLine("优惠促销1、不打折；2、打九折；3、打八五折；4、买300送50；5、买500送100");
string input = Console.ReadLine();
CalFather cal = CalMoney(input);
Console.WriteLine("实际应付{0}元", cal.GetPayMoney(realMoney));
//给出小票的信息
Console.WriteLine("以下是您的购物信息");
foreach (var item in pros)
{
Console.WriteLine("货物名称：{0}，货物单价：{1}，货物编号：{2}", item.Name, item.Price, item.ID);
}
}