using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Salary s = new Salary();
            Prize1 p1 = new Prize1();
            Prize2 p2 = new Prize2();
            Prize3 p3 = new Prize3();
            Command c = new ConcreteCommand(s);
            Invoker i = new Invoker();
            i.SetCommand(c);
            Console.WriteLine("基本工资:" + i.ExecuteCommand());
            c = new ConcreteCommand(p1);
            i.SetCommand(c);
            Console.WriteLine("奖金1:" + i.ExecuteCommand());
            c = new ConcreteCommand(p2);
            i.SetCommand(c);
            Console.WriteLine("奖金2:" + i.ExecuteCommand());
            c = new ConcreteCommand(p3);
            i.SetCommand(c);
            Console.WriteLine("奖金3:" + i.ExecuteCommand());
            Console.Read();
        }
    }

    abstract class Command
    {
        protected Receiver _receiver;

        public Command(Receiver receiver)
        {
            this._receiver = receiver;
        }

        abstract public string Execute();
    }

    class ConcreteCommand : Command
    {
        public ConcreteCommand(Receiver receiver)
            : base(receiver)
        {
        }

        public override string Execute()
        {
            return base._receiver.Action();
        }
    }

    class Invoker
    {
        private Command _command;

        public void SetCommand(Command cmd)
        {
            this._command = cmd;
        }

        public string ExecuteCommand()
        {
            return this._command.Execute();
        }
    }

    class Receiver
    {
        public virtual string Action()
        {
            return "执行命令";
        }
    }

    class Salary : Receiver
    {

        public override string Action()
        {
            return "1000";
        }
    }

    class Prize1 : Receiver
    {

        public override string Action()
        {
            return "500";
        }
    }

    class Prize2 : Receiver
    {

        public override string Action()
        {
            return "400";
        }
    }

    class Prize3 : Receiver
    {

        public override string Action()
        {
            return "300";
        }
    }
}

static Invoker Salary = () => "1000";