C# 之 继承

标签：c#   语言   

class Program
    {
        static void Main(string[] args)
        {
            Cow cow = new Cow("牛牛");
            cow.EatFood();
            cow.Breed();
            cow.Moo();
            cow.SupplyMilk();


            Console.WriteLine();


            Chicken chicken = new Chicken("咕咕");
            chicken.EatFood();
            chicken.Breed();
            chicken.Cluck();
            chicken.LayEgg();
        }
    }
    //动物类
    class Animal      
    {
        protected string name = "";
        public Animal(string name)
        {
            this.name = name;
        }
        public void EatFood()           //吃东西
        {
            Console.WriteLine(this.name + "会吃东西"); 
        }
        public void Breed()             //繁殖后代
        {
            Console.WriteLine( this.name + "能繁殖后代");
        }
    }
    class Cow:Animal
    {
        public Cow(string name): base(name)
        { }
        public void Moo()               //牛叫
        {
            Console.WriteLine( "我的名字叫" + name + " 哞");
        }
        public void SupplyMilk()        //提供牛奶
        {
            Console.WriteLine( "我的名字叫" + name + " 我能提供牛奶");
        }
    }
    class Chicken : Animal
    {
        public Chicken(string name):base(name)
        { }
        public void Cluck()             //鸡叫
        {
            Console.WriteLine("我的名字叫" + name + " 咯咯咯");
        }
        public void LayEgg()            //下蛋
        {
            Console.WriteLine("我的名字叫" + name + " 我能下蛋");
        }
    }

继承的缺点：如果父类改变，那么子类就不得不变。继承会破坏包装，父类实现细节暴露给子类，增大了两个类之间的耦合性。

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C# 之 继承

标签：c#   语言   

原文地址：http://blog.csdn.net/ry513705618/article/details/26075653