C#扩充类

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace 课本习题

{

    public class Animal

    {

        public Animal()

        {

            Console.WriteLine("基类构造函数：Hello，Animal");

        }

        public void Eat()

        {

            Console .WriteLine("扩充类方法：Eating");

        }

    }

    public class Cat:Animal

    {

        public Cat()

        {

            Console.WriteLine("扩充类构造函数：Hello，Cat");

        }

        public void Walk()

        {

            Console .WriteLine("扩充类方法：Walking");

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            Cat cat=new Cat ();

            cat.Eat();

            cat.Walk();

            Console .ReadLine();

        }

    }

}