c#经典面试题：猫叫，主人醒，老鼠跑

实现方法：分3个类实现，分别为猫类，老鼠类，主人类。

猫类：定义一个猫叫事件；

老鼠类：订阅猫叫事件，在猫发出叫声这个事件后，老鼠逃跑；

主人类：类似于老鼠类，在猫发出叫声这个事件后，主人醒来；

猫类实现如下：

namespace CarCry
{
/// <summary>
/// 猫类的定义
/// </summary>
public class Cat
{
//猫名
private string _name;
//猫叫事件
public event EventHandler<CatCryEventArgs> CatCryEvent;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="name">名字参数</param>
public Cat(string name)
{
_name = name;
}

/// <summary>
/// 促发猫叫的事件
/// </summary>
public void CatCry()
{
CatCryEventArgs args = new CatCryEventArgs(_name);
Console.WriteLine(args);
CatCryEvent(this, args);
}
}

/// <summary>
/// 猫叫事件参数
/// </summary>
public class CatCryEventArgs : EventArgs
{
//发出叫声的猫的名字
private string _catname;
/// <summary>
/// 构造函数
/// </summary>
public CatCryEventArgs(string catname)
: base()
{
_catname = catname;
}

/// <summary>
/// 输出参数内容
/// </summary>
public override string ToString()
{
return "猫 " + _catname + " 叫了";
}
}
}

老鼠类的实现如下：

namespace CarCry
{
public class Mouse
{
//老鼠名字
private string _name;
/// <summary>
/// 构造函数
/// </summary>
/// <param name="name">老鼠的名字</param>
/// <param name="cat">发出叫声的猫</param>
public Mouse(string name, Cat cat)
{
_name = name;
cat.CatCryEvent += CatCryHandle;//订阅猫叫事件
}

/// <summary>
/// 猫叫事件处理
/// </summary>
/// <param name="sender"></param>
/// <param name="args"></param>
private void CatCryHandle(object sender, CatCryEventArgs args)
{
Run();
}

/// <summary>
/// 逃跑方法
/// </summary>
private void Run()
{
Console.WriteLine("老鼠 " + _name + " 逃跑了");
}
}
}

主人类的实现如下：

namespace CarCry
{
public class Master
{
//主人名字
private string _name;

/// <summary>
/// 构造函数，订阅事件
/// </summary>
/// <param name="name">主人名字</param>
/// <param name="cat">猫</param>
public Master(string name, Cat cat)
{
_name = name;
cat.CatCryEvent += CatCryHandler;//订阅猫叫事件
}

/// <summary>
/// 猫叫事件处理
/// </summary>
/// <param name="sender"></param>
/// <param name="args">猫叫事件</param>
private void CatCryHandler(object sender, CatCryEventArgs args)
{
WakeUp();
}

/// <summary>
/// 主人醒了事件
/// </summary>
private void WakeUp()
{
Console.WriteLine("主人 " + _name + " 醒了");
}
}
}

主函数的调用如下：

namespace CarCry
{
class MainClass
{
static void Main(string[] args)
{
Console.WriteLine("开始模拟");
Cat cat = new Cat("Tom");
Mouse mouse1 = new Mouse("Jack", cat);
Mouse mouse2 = new Mouse("jackson", cat);
Master master = new Master("Tao", cat);
Master master2 = new Master("Hong", cat);
cat.CatCry();
Console.ReadLine();
}
}
}

转载于:https://www.cnblogs.com/JuneZhang/archive/2011/06/30/2094896.html