/// <summary>
/// 交易
/// </summary>
public void Dealing()
{
Console.WriteLine("Welcom! We got Nokia, Lenovo and Apple, what do you like?");
string input = Console.ReadLine();
Console.WriteLine("how many {0} do you want?", input);
int quantity = Convert.ToInt32(Console.ReadLine());
Goods[] goods = repository.GetGoods(input, quantity);
double totalAmount = goods[0].Price * goods.Length;//打折前总价
Console.WriteLine("select discounting type: 1--no discount 2--10% off 3--15% off 4--up to 500 reduce 100");
DiscountBase discoun = GetDiscountType(Console.ReadLine());
//打印小票
foreach (Goods item in goods)
{
Console.WriteLine("item: {0}\tID: {2}\tprice: {1} Yuan", item.Name, item.Price, item.ID);
}
Console.WriteLine("total: {0} Yuan\npayment: {1} Yuan", goods[0].Price * goods.Length, discoun.GetDiscountedAmount(totalAmount));
}
/// <summary>
/// 简单工厂模式，根据选择的打折方式返回打折对象
/// </summary>
/// <param name="input">输入的数字</param>
/// <returns>打折的父类，装的是子类对象</returns>
public DiscountBase GetDiscountType(string input)
{
DiscountBase dis = null;
switch (input)
{
case "1":
dis = new NoDiscount();
break;
case "2":
dis = new DisountByRate(0.9);
break;
case "3":
dis = new DisountByRate(0.85);
break;
case "4":
dis = new UpTo_Discount(500, 100);
break;
}
return(dis);
}