设计模式---状态模式（今天CSDN竟然上不去，暂时发在这里） (从百度空间转回来的)

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设计模式—状态模式（今天CSDN竟然上不去，暂时发在这里）

58cbf8feaccd5d265d60085a.jpg

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

namespace ConsoleApplication1
{
    abstract class State
    {
        public abstract void DoWhatIShouldDo(Worker w);
    }

    class Young : State
    {
        public override void DoWhatIShouldDo(Worker w)
        {
            if (w.Age <= 35)
            {
                Console.WriteLine("我年轻，逍遥自在");
            }
            else
            {
                w.State = new MiddleAge();
                w.DoWhatIShouldDo();
            }
        }
    }

    class MiddleAge : State
    {
        public override void DoWhatIShouldDo(Worker w)
        {
            if (w.Age <= 50)
            {
                Console.WriteLine("人到中年");
            }
            else
            {
                w.State = new Old();
                w.DoWhatIShouldDo();
            }
        }
    }

    class Old : State
    {
        public override void DoWhatIShouldDo(Worker w)
        {
            Console.WriteLine("老年生活");
        }
    }

    class Worker
    {
        State state;
        int age;

        public Worker()
        {
            age = 1;
            state = new Young();
        }

        public int Age
        {
            get { return age; }
            set { age = value; }
        }

        public State State
        {
            get { return State; }
            set { state = value; }
        }

        public void DoWhatIShouldDo()
        {
            state.DoWhatIShouldDo(this);
        }
    }

    class Client
    {
        public static void Main()
        {
            Worker w = new Worker();
            w.Age = 5;
            w.DoWhatIShouldDo();
            w.Age = 45;
            w.DoWhatIShouldDo();
            w.Age = 80;
            w.DoWhatIShouldDo();
            Console.Read();
        }
    }
}