学步园

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics; // 调试
using System.Collections;


namespace benben_CSharp_first
{
    // 定义 动物 抽象类
    public abstract class Animal
    {
        protected string name;

        public string Name
        {
            get
            {
                return name;
            }
            set
            {
                name = value;
            }
        }

        public Animal()
        {
            name = "The animal with no name.. ";
        }

        public Animal(string newName)
        {
            name = newName;
        }

        public void Feed()
        {
            Console.WriteLine("{0} has been fed.", name);

        }
    }

    // 奶牛 类
    public class Cow : Animal
    {
        public void milk()
        {
            Console.WriteLine("{0} has been milked.", name);
        }

        public Cow(string newName)
            : base(newName)
        {
        }
    }

    // 鸡 类
    public class Chicken : Animal
    {
        public void LayEgg()
        {
            Console.WriteLine("{0} has laid an egg..", name);
        }

        public Chicken(string newName)
            : base(newName)
        {
        }
    }


    class Test
    {
        static void Main()
        {
            Console.WriteLine(("Create an Array type collection of Animal " +
                "object and use it: \n "));

            Animal[] animalArray = new Animal[2];
            Cow myCow1 = new Cow("Deirdre");
            animalArray[0] = myCow1;
            animalArray[1] = new Chicken("Ken");

            foreach (Animal myAnimal in animalArray)
            {
                Console.WriteLine("New {0} object added to Array collection, " +
                    "Name = {1}", myAnimal.ToString(), myAnimal.Name);
            }



            Console.WriteLine("Array collection contains {0} objects.",
                animalArray.Length);
            animalArray[0].Feed();
            ((Chicken)animalArray[1]).LayEgg();
            Console.WriteLine();

            Console.WriteLine("Create an ArrayList type collection of Animal " +
                "object and use it: ");

            ArrayList animalArrayList = new ArrayList();
            Cow myCow2 = new Cow("Hayley");
            animalArrayList.Add(myCow2);
            animalArrayList.Add(new Chicken("Roy"));

            foreach (Animal myAnimal in animalArrayList)
            {
                Console.WriteLine("New {0} object added to ArrayList collection, " +
                    " Name = {1}", myAnimal.ToString(), myAnimal.Name);
            }
            Console.WriteLine("ArrayList collection contains {0} object. ",
                animalArrayList.Count);
            ((Animal)animalArrayList[0]).Feed();
            ((Chicken)animalArrayList[1]).LayEgg();
            Console.WriteLine();

            Console.WriteLine("Additional manipulation of ArrayList: ");
            animalArrayList.RemoveAt(0);
            ((Animal)animalArrayList[0]).Feed();
            animalArrayList.AddRange(animalArray);
            ((Chicken)animalArrayList[2]).LayEgg();

            Console.WriteLine("The animal called {0} is at index {1}.",
                myCow1.Name, animalArrayList.IndexOf(myCow1));
            myCow1.Name = "Janice";
            Console.WriteLine("The animal is now called {0}.",
                ((Animal)animalArrayList[1]).Name);

            Console.ReadKey();

        }
    }
}