using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MethodOverrideByNew
{
  public enum Genders { 
    Female=0,
    Male=1
  }
  public class Person {
    protected string _name;
    protected int _age;
    protected Genders _gender;
    /// <summary>
    /// 父類(lèi)構(gòu)造函數(shù)
    /// </summary>
    public Person() {
      this._name = "DefaultName";
      this._age = 23;
      this._gender = Genders.Male;
    }
    /// <summary>
    /// 定義虛函數(shù)IntroduceMyself()
    /// </summary>
    public virtual void IntroduceMyself() {
      System.Console.WriteLine("Person.IntroduceMyself()");
    }
    /// <summary>
    /// 定義虛函數(shù)PrintName()
    /// </summary>
    public virtual void PrintName() {
      System.Console.WriteLine("Person.PrintName()");
    }
  }
  public class ChinesePerson :Person{
    /// <summary>
    /// 子類(lèi)構(gòu)造函數(shù)，指明從父類(lèi)無(wú)參構(gòu)造函數(shù)調(diào)用起
    /// </summary>
    public ChinesePerson() :base(){
      this._name = "DefaultChineseName";
    }
    /// <summary>
    /// 覆蓋父類(lèi)方法IntroduceMyself，使用new關(guān)鍵字修飾虛函數(shù)
    /// </summary>
    public new void IntroduceMyself() {
      System.Console.WriteLine("ChinesePerson.IntroduceMyself()");
    }
    /// <summary>
    /// 重載父類(lèi)方法PrintName，使用override關(guān)鍵字修飾虛函數(shù)
    /// </summary>
    public override void PrintName(){
      System.Console.WriteLine("ChinesePerson.PrintName()");      
    }
  }

  class Program
  {
    static void Main(string[] args)
    {
      //定義兩個(gè)對(duì)象，一個(gè)父類(lèi)對(duì)象，一個(gè)子類(lèi)對(duì)象
      Person aPerson = new ChinesePerson();
      ChinesePerson cnPerson = new ChinesePerson();
      //調(diào)用覆蓋的方法，父類(lèi)對(duì)象不能調(diào)用子類(lèi)覆蓋過(guò)的方法，只能調(diào)用自身的虛函數(shù)方法
      aPerson.IntroduceMyself();   
      cnPerson.IntroduceMyself();
      //調(diào)用重載方法，父類(lèi)對(duì)象和子類(lèi)對(duì)象都可以調(diào)用子類(lèi)重載過(guò)后的方法
      aPerson.PrintName();
      cnPerson.PrintName();

      System.Console.ReadLine();
    }
  }
}