static void Main(string[] args)
{
//下订单：2巧克力 1牛奶 的 longblack
//1 longblack
Drink order = new LongBlack();
Console.WriteLine("费用:\t" + order.Cost());
Console.WriteLine("描述:\t" + order.GetDescription());
//2 加牛奶
order = new Milk(order);
Console.WriteLine("费用:\t" + order.Cost());
Console.WriteLine("描述:\t" + (order as Decorator).GetDescription());
//3 加巧克力
order = new Chocolate(order);
Console.WriteLine("费用:\t" + order.Cost());
Console.WriteLine("描述:\t" + (order as Decorator).GetDescription());
//3 加巧克力
order = new Chocolate(order);
Console.WriteLine("费用:\t" + order.Cost());
Console.WriteLine("描述:\t" + (order as Decorator).GetDescription());
Console.ReadLine();
}
static void Main(string[] args)
{
Beverage beverage = new Espresso();
beverage = new Milk(beverage);
beverage = new Chocolate(beverage);
Console.WriteLine(beverage.Description());
Console.WriteLine(beverage.Cost());
}