/// <summary>
/// 根据用户的输入选择折扣类型
/// </summary>
/// <param name="input"></param>
/// <returns></returns>
public BaseDiscount GetDiscount(string input)
{
BaseDiscount dis = null;
switch (input)
{
case "1": dis = new NoDiscount();
break;
case "2": dis = new DiscountRate(0.9);
break;
case "3": dis = new DiscountRate(0.85);
break;
case "4": dis = new DiscountBuyMSendN(300, 50);
break;
case "5": dis = new DiscountBuyMSendN(500, 100);
break;
}
return(dis);
}
/// <summary>
/// 根据用户的输入选择一个打折方式
/// 这里使用的就是典型的--简单工厂模式
/// </summary>
/// <param name="input">打折方式</param>
/// <returns>f返回一个打折父类类型，但是装的一定是一个子类类型的对象</returns>
public DiscountFather GetDiscount(string input)
{
DiscountFather discountWay = null;//注意这个DiscountFather是一个抽象类，不能实例化
switch (input)
{
case "1": discountWay = new DiscountNormal();
break;
case "2": discountWay = new DiscountRate(0.9);
break;
case "3": discountWay = new DiscountRate(0.85);
break;
case "4": discountWay = new DiscountMForN(300, 50);
break;
case "5": discountWay = new DiscountMForN(500, 100);
break;
}
return(discountWay);
}
