public Mocha(Beverage beverage)
{
this.beverage = beverage;
}
public override double Cost()
{
return(Beverage.Cost() + 0.2);
}
public override string GetDescription()
{
return(Beverage.GetDescription() + "，加了牛奶");
}
public Milk(Beverage beverage)
{
this.Beverage = beverage;
}
