public void AskBuy()
{
Console.WriteLine("Welcome to supermarket, please you need why?");
Console.WriteLine("We have Lenove computer and Vegtable, and Car and Ice");
string Type = Console.ReadLine();
Console.WriteLine("You want need how much");
int Count = Convert.ToInt32(Console.ReadLine());
//去仓库取货
Commodity[] comms = _lib.OutputGoods(Type, Count);
//要钱
double Money = GetMoney(comms);
Console.WriteLine("You give me Preferential befor{0}￥", Money);
//提示客户有那些打折方式
Console.WriteLine("Please select your Preferential way");
Console.WriteLine("1. not; 2.99; 3.85; 4.Buy 300￥send 50￥");
string Input = Console.ReadLine();
Preferential OutMoney = SelectWay(Input);
double TotalMoney = OutMoney.PreferentialWay(Money);
Console.WriteLine("You give me {0} ￥", TotalMoney);
}
public Preferential SelectWay(string Input)
{
Preferential way = null;
switch (Input)
{
case "1":
return(way = new NormalMoney());
case "2":
return(way = new Preferential99(0.99));
case "3":
return(way = new Preferential99(0.85));
}
return(way);
}
