static void Main(string[] args)
{
double money = 0;
CashContext context;
money = Convert.ToDouble(Console.ReadLine());
CashSuper cashNormal = new CashNormal();
context = new CashContext(cashNormal);
Console.WriteLine("无任何活动下收费：" + context.GetResult(money));
CashSuper cashRebate = new CashRebate(0.8);
context = new CashContext(cashRebate);
Console.WriteLine("打八折的情况下收费：" + context.GetResult(money));
CashSuper cashReturn = new CashReturn(300, 100);
context = new CashContext(cashReturn);
Console.WriteLine("满300送100下收费：" + context.GetResult(money));
context = new CashContext(new List <CashSuper> {
cashRebate, cashReturn
});
Console.WriteLine("先打八折，再满300 送100下收费：" + context.GetResult(money));
context = new CashContext(new List <CashSuper> {
cashReturn, cashRebate
});
Console.WriteLine("先满300 送100，再打八折：" + context.GetResult(money));
Console.ReadKey();
}
public CashContext(string type)
{
switch (type)
{
case "正常收费":
CashNormal cashNormal = new CashNormal();
cs = cashNormal;
break;
case "满300减100":
CashReturn cashReturn = new CashReturn("300", "100");
cs = cashReturn;
break;
case "打八折":
CashRebate cashRebate = new CashRebate("0.8");
cs = cashRebate;
break;
}
}
public static CashSuper CreateCashAccept(string type)
{
CashSuper cs = null;
switch (type)
{
case "正常收费":
cs = new CashNormal();
break;
case "满300返100":
cs = new CashReturn("300", "100");
break;
case "打八折":
cs = new CashRebate("0.8");
break;
default:
break;
}
return(cs);
}