WeiBlog

using System;

namespace 简单工厂设计模式//（抽象类实现的多态）
{
class Program
{
static void Main(string[] args)
{
string brand = Console.ReadLine();
NoteBook cosm = GetNoteBook(brand);
cosm.Say();
}

    public static NoteBook GetNoteBook(string brand)
    {
        NoteBook nb = null;
        switch(brand)
        {
            case "Lenovo":nb = new Lenovo();
                break;
            case "Acre":nb = new Acre();
                break;
            case "IBM":nb = new IBM();
                break;
        }
        return nb;
    }

    public abstract class NoteBook
    {
        public abstract void Say();
    }

    public class Lenovo : NoteBook
    {
        public override void Say()
        {
            Console.WriteLine("Lenovo");
        }
    }

    public class Acre:NoteBook
    {
        public override void Say()
        {
            Console.WriteLine("Acre");
        }
    }

    public class IBM:NoteBook
    {
        public override void Say()
        {
            Console.WriteLine("IBM");
        }
    }
}

}