老话题：主人、猫和老鼠

昨天朋友去面试，遇到了一个很常见的C#笔试题。发现现在好多公司都是在网上随便找点题来笔试。
以前看到过的一种方法，没有时间查了，凭印象写的，谁写的如果看到，确认一下。

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

namespace  CatAndMouse
{
     public   delegate   void  CatEventHandle( int  score);

     class  Sleeping
    {
         public   event  CatEventHandle CatEvent;
         private   int  intScore;

         public   int  IntScore
        {
             get
            {
                 return  intScore;
            }
             set
            {
                 if  ( ! int .Equals(intScore, value))
                {
                    CatEvent(value);
                }
                 else
                {
                    intScore  =  value;
                }
            }
        }
    }

     class  Mouse
    {
         public  Mouse(Sleeping slp)
        {
            slp.CatEvent  +=   new  CatEventHandle(slp_CatEvent);
        }

         void  slp_CatEvent( int  score)
        {
             if  (score  >=   30 )
            {
                Console.WriteLine( " 老鼠：猫叫了，快逃命 " );
            }
             else
            {
                Console.WriteLine( " 系统：猫叫了，老鼠没有听到 " );
            }
        }
    }

     class  Master
    {
         public  Master(Sleeping slp)
        {
            slp.CatEvent  +=   new  CatEventHandle(slp_CatEvent);
        }

         void  slp_CatEvent( int  score)
        {
             if  (score  >=   30 )
            {
                Console.WriteLine( " 主人：猫叫了，去看看 " );
            }
             else
            {
                Console.WriteLine( " 系统：猫叫了，主人没有听到 " );
            }
        }
    }

     class  Program
    {
         static   void  Main( string [] args)
        {
            Sleeping slp  =   new  Sleeping();
            Mouse mou  =   new  Mouse(slp);
            Master mas  =   new  Master(slp);
             int  i  =   1 ;
             while  (i  <=   50 )
            {
                Console.WriteLine( " ********************************************* " );
                Console.WriteLine( " *\t "   +  i.ToString()  +   " \t分贝 " );
                Console.WriteLine( " ********************************************* " );

                slp.IntScore  =  i;
                i ++ ;
            }

            Console.Read();
        }
    }
}

今天有点休息时间随便又写了一下，几分钟的时间，所以不对请批评：）统统接受。命名没有太注意，见谅。

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

namespace  CatAndMouse_New
{
     public   delegate   void  CatEventHandler( int  score);
    
     class  Program
    {
         static   void  Main( string [] args)
        {
             int  i  =   1 ;
             while (i  <=   50 )
            {
                Console.WriteLine( " ********************************************* " );
                Console.WriteLine( " *\t "   +  i.ToString()  +   " \t分贝 " );
                Console.WriteLine( " ********************************************* " );

                CatEventHandler ceh  =   new  CatEventHandler( new  Mouse().slp_CatEvent);
                CatEventHandler ceh1  =   new  CatEventHandler( new  Master().slp_CatEvent);

                CatEventHandler ceh2  =  ceh  +  ceh1;

                ceh2(i);

                i ++ ;
            }

            Console.Read();
        }
    }

     abstract   class  CatEvent
    {
         public   abstract   void  slp_CatEvent( int  score);
    }

     class  Mouse : CatEvent
    {
         public   override   void  slp_CatEvent( int  score)
        {
             if  (score  >=   30 )
            {
                Console.WriteLine( " 老鼠：猫叫了，快逃命 " );
            }
             else
            {
                Console.WriteLine( " 系统：猫叫了，老鼠没有听到 " );
            }
        }
    }

     class  Master : CatEvent
    {
         public   override   void  slp_CatEvent( int  score)
        {
             if  (score  >=   30 )
            {
                Console.WriteLine( " 主人：猫叫了，去看看 " );
            }
             else
            {
                Console.WriteLine( " 系统：猫叫了，主人没有听到 " );
            }
        }
    }
}