状态模式c#(状态流转例子吃饭)

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

namespace 状态模式
{
    public interface State
    {
        void doSomething(Person p);
    }

    public class Mstate : State
    {
        public void doSomething(Person p)
        {
            if (p.hours == 7)
            {
                Console.WriteLine("吃早餐");
            }
            else
            {
                p.state = new Lstate();
                p.doSomething();
            }
        }
    }
        public class Lstate : State
    {
        public void doSomething(Person p)
        {
            if (p.hours == 12)
            {
                Console.WriteLine("吃午餐");
            }
            else
            {
                p.state =new Nstate();
                p.doSomething();
            }
        }
    }
     public class Nstate : State
    {
        public void doSomething(Person p)
        {
            if (p.hours == 18)
            {
                Console.WriteLine("吃晚餐");
            }
            else
            {
                p.state =new NOstate();
                p.doSomething();
            }
        }
    }
        public class NOstate : State
    {
        public void doSomething(Person p)
        {
            Console.WriteLine("没得吃");
          
             
        }
    }
    public class Person
    {
        public State state { get; set; }

        public int hours { get; set; }

        public Person()
        {
            state=new Mstate();
        }

        public void doSomething()
        {
            state.doSomething(this);
            state=new Mstate();
        }
    }

    class Program
    {
        static void Main(string[] args)
        {
            Person p=new Person();
            p.hours = 7;
            p.doSomething();
            p.hours = 12;
            p.doSomething();
            p.hours = 18;
            p.doSomething();
            p.hours = 8;
            p.doSomething();
            p.hours = 7;
            p.doSomething();
            Console.ReadKey();
        }
    }
}