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C# 热水器

  需求分析:现在有一个烧水器假设水温升高到100度为开水请用设计程序模拟整个烧水的过程,打开热水器,当水温达到95度时报警器开始发出警报,水温达到100度时,断开热水器电源。

 

我们使用常规的思维去分析这个需求,不就一个开关控制,一个警报吗?不假思索代码就好了,我们来看看下面的垃圾代码啊。

 

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Threading;namespace heater{    class Program    {        static int tempture = 0;        /// <summary>        /// 开关        /// </summary>        class Switcher        {             public void SwitchOn()            {                Console.WriteLine("热水器被打开");            }            public void SwitchOff()            {                Console.WriteLine("热水器被关闭");            }        }               /// <summary>        /// 热水器        /// </summary>        class Heater        {            public  void BoidWater()            {                int i = 0;                for (i = 0; i <= 100; i++)                {                    tempture = i;                    Thread.Sleep(1000 / (i + 1));                    if (tempture < 95 && tempture % 10 == 0)                    {                        Console.WriteLine("烧水中...");                    }                    else                    {                        MakeAlerm(tempture);                        ShowTempture(tempture);                    }                }            }            public static void MakeAlerm(int tem)            {                if (tem > 95)                {                    Console.WriteLine("报警器:“嘀嘀嘀,水快烧开了.....”");                }            }            private static void ShowTempture(int tempture)            {                if (tempture > 95)                {                    if (tempture == 100)                    {                        Console.WriteLine("\n水真的开了\n");                    }                    else                    {                        Console.WriteLine("水的温度是:{0}\n", tempture);                    }                }            }        }        static void Main(string[] args)        {            Heater heater = new Heater();            Switcher switcher = new Switcher();            switcher.SwitchOn();            heater.BoidWater();            switcher.SwitchOff();            Console.ReadLine();        }    }}
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不信你就看截图:应该还满足需求吧.

这样写我根本就没动脑子,说实话连垃圾都不如,没一点价值,完全以一个码农去完成了。现在我们换个思维去思考,设计模式中是不是有一种叫做观察者模式的,我们可不可以借助观察者模式去试下呢?既然是观察者模式肯定有像观察者一样的对象,我感觉此处的观察者就是热水器,它实时监控着水温,而水温是其他事件的触发者,下面我们看看这次写的代码:

observer.cs

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Threading;namespace oberver{    //开关    public class  Switch    {        public void SwitchOn(int tempture)        {            if (tempture <= 0)            {                Console.WriteLine("热水器被打开");            }        }        public void Switchoff(int tempture)        {            if (tempture >= 100)            {                Console.WriteLine("热水器被关闭");            }        }    }    //热水器    public class Heater    {        private int tempture;        public delegate void BoildHander(int param); //声明委托        public event BoildHander BoilEvent;           //声明事件        //烧水        public void BoilWater()        {            if (BoilEvent != null)            {                BoilEvent(tempture);            }            for (int i = 0; i <= 100; i++)            {                tempture = i;                Thread.Sleep(1000 / (i + 1));                if (i % 10 == 0 && i<100)                {                    Console.WriteLine("烧水中...");                }                //Console.WriteLine("烧水中,温度:{0}‘",tempture);                if (tempture > 95)                {                    if (BoilEvent != null) //如果有注册事件                    {                        BoilEvent(tempture);//调用所有注册时间的方法                    }                }            }        }    }    //警报器    public class Alarm    {        public void MakeAlert(int tempture)        {            if (tempture >= 96)            {                Console.WriteLine("嘀嘀嘀,水已经{0}度了\n", tempture);            }        }    }    //显示器    public class Display    {        public static void ShowMsg(int tem)        {            if (tem == 100)            {                Console.WriteLine("水烧开了,当前温度是:{0}度\n", tem);            }        }    }    class Progrm     {        static void Main(string[] args)        {            Switch switcher = new Switch(); 
            Heater heater = new Heater();            Alarm alarm = new Alarm();            heater.BoilEvent += switcher.SwitchOn; //注册事件            heater.BoilEvent += alarm.MakeAlert;   //注册事件            //heater.BoilEvent += (new Alarm()).MakeAlert; //匿名对象注册方法            heater.BoilEvent += Display.ShowMsg; //注册方法            heater.BoilEvent += switcher.Switchoff;            heater.BoilWater(); //开始烧水            Console.Read();        }    }}

 此次运行结果:

同样的功能,不一样的代码,后者是不是有种高大上的感觉。