软考试题分析

namespace ConsoleApplication
{
    #region 2016软考下半年下午最后一题
    class Invoice
    {
        public virtual void printInvoice()
        {
            System.Console.WriteLine("This is invoice content");
        }
    }

    abstract class Print : Invoice
    {
        public Invoice inv;
        public Print(Invoice t)
        {
            inv = t;
        }
        public override void printInvoice()
        {
            if (inv != null)
            {
                //.....
                inv.printInvoice();
            }
        }
    }

    class HeadPrint : Print
    {
        public HeadPrint(Invoice t) : base(t)
        {
        }
        public override void printInvoice()
        {
            System.Console.WriteLine("This is invoice head");
            //...
            inv.printInvoice();
        }
    }

    class FootPrint : Print
    {
        public FootPrint(Invoice t) : base(t)
        {
        }
        public override void printInvoice()
        {
            //...            
            inv.printInvoice();
            System.Console.WriteLine("This is invoice foot");
        }
    }
    #endregion

    #region 2012软考上半年下午最后一题
    abstract class Beverage //饮料
    {
        public string description = "Unknown Beverage";
        public virtual string getDescription()
        {
            return description;
        }
        public abstract int cost();
    }

    abstract class CondimentDecorator : Beverage //配料
    {
        public Beverage beverage;
    }

    class Espresso : Beverage //蒸馏咖啡
    {
        private int ESPRESSO_PRICE = 25;
        public Espresso()
        {
            description = "Espresso";
        }
        public override int cost()
        {
            return ESPRESSO_PRICE;
        }
    }

    class DarkRoast : Beverage //深度烘培咖啡
    {
        private int DARKROAST_PRICE = 20;
        public DarkRoast()
        {
            description = "DarkRoast";
        }
        public override int cost()
        {
            return DARKROAST_PRICE;
        }
    }

    class Mocha : CondimentDecorator //深度烘培咖啡
    {
        private int MOCHA_PRICE = 10;
        public Mocha(Beverage beverage)
        {
            this.beverage = beverage;
        }
        public override string getDescription()
        {
            return beverage.getDescription() + ", Mocha";
        }
        public override int cost()
        {
            return MOCHA_PRICE + beverage.cost();
        }
    }

    class Whip : CondimentDecorator //奶泡
    {
        private int WHIP_PRICE = 8;
        public Whip(Beverage beverage)
        {
            this.beverage = beverage;
        }
        public override string getDescription()
        {
            return beverage.getDescription() + ", Whip";
        }
        public override int cost()
        {
            return WHIP_PRICE + beverage.cost();
        }
    }
    #endregion

    class Program
    {
        static void Main(string[] args)
        {
            //Beverage beverage = new DarkRoast();
            //beverage = new Mocha(beverage);
            //beverage = new Whip(beverage);
            //System.Console.WriteLine(beverage.getDescription() + " ￥" + beverage.cost());

            Invoice t = new Invoice();
            Print second;
            second = new HeadPrint(t);
            second.printInvoice();
            System.Console.WriteLine("---------");
            second = new FootPrint(second);
            second.printInvoice();

            System.Console.ReadKey();
        }
    }
}