// 注意参数不是具体的收费策略对象，而是一个字符串，表示收费类型
// 将实例化具体策略的过程由客户端转移到Context类中。简单工厂的应用
public CashContext(string type)
{
switch (type)
{
case "正常收费":
cs = new CashNormal();
break;
case "满300返100":
cs = new CashReturn("300", "100");
break;
case "打8折":
cs = new CashRebate("0.8");
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":
CashReturn cr1 = new CashReturn("300", "100");
cs = cr1;
break;
case "打八折":
CashRebate cr2 = new CashRebate("0.8");
cs = cr2;
break;
}
return(cs);
}
