老師都有講課這個方法，一個老師先是在西部偏遠山區，是站在教室裡木頭的黑板前講課；過了幾年表現好，調到了稍微好點的城市裡，是坐在教室前用多媒體設備講課；又過了幾年考博士了，畢業後繼續當老師，不過現在是躺在家裡對著電腦遠程授課。都是講課這個方法，不同的條件下（參數不同）有不同的執行過程和輸出結果。這就是重載。
重載的定義是：在同一個類中 ，或者是這個類的子類中，有若干個同名的方法就是重載，不過方法同名但是參數列表必須不同。在子類的情況就是，子類有和父類方法名相同但參數列表不同的方法，而且父類的該名字的方法必須為protected和public型的。
看下面代碼：
學校高考完後，有好幾個被北大和清華錄取了，於是學校請老師去五星級酒店吃飯。門迎見到顧客光臨，要稱呼：男士/女士，歡迎光臨！
[csharp]
using System;
namespace YYS.CSharpStudy.MainConsole
{
public class YSchool
{
private int id = 0;
private string name = string.Empty;
public int ID
{
get
{
return this.id;
}
}
public string Name
{
get
{
return name;
}
}
public YSchool()
{
this.id = 0;
this.name = @"清華大學附中";
}
public YSchool(int id, string name)
{
this.id = id;
this.name = name;
}
/// <summary>
/// 構造器
/// </summary>
public YSchool(int id)
{
this.id = id;
this.name = @"陝師大附中";
}
}
public class YTeacher
{
private int id = 0;
private string name = string.Empty;
private YSchool school = null;
private string introDuction = string.Empty;
private string imagePath = string.Empty;
public int ID
{
get
{
return id;
}
}
public string Name
{
get
{
return name;
}
}
public YSchool School
{
get
{
if (school == null)
{
school = new YSchool();
}
return school;
}
set
{
school = value;
}
}
public string IntroDuction
{
get
{
return introDuction;
}
set
{
introDuction = value;
}
}
public string ImagePath
{
get
{
return imagePath;
}
set
{
imagePath = value;
}
}
/// <summary>
/// 構造器
/// </summary>
public YTeacher(int id, string name)
{
this.id = id;
this.name = name;
}
/// <summary>
/// 構造器
/// </summary>
public YTeacher(int id, string name, YSchool school)
{
this.id = id;
this.name = name;
this.school = school;
}
/// <summary>
/// 給學生講課的方法
/// </summary>
public void ToTeachStudents()
{
Console.WriteLine(string.Format(@"{0} 老師教育同學們： Good Good Study,Day Day Up!", this.name));
}
/// <summary>
/// 懲罰犯錯誤學生的方法
/// </summary>
/// <param name="punishmentContent"></param>
public void PunishmentStudents(string punishmentContent)
{
Console.WriteLine(string.Format(@"{0} 的{1} 老師讓犯錯誤的學生 {2}。", this.School.Name, this.name, punishmentContent));
}
}
public class MrTeacher : YTeacher
{
public MrTeacher(int id, string name)
: base(id, name)
{
}
/// <summary>
/// 擴展的方法，刮胡子方法。
/// </summary>
public void Shave()
{
Console.WriteLine(string.Format(@"{0} 老師用飛科剃須刀刮胡子。",this.Name));
}
}
public class MisTeacher : YTeacher
{
public MisTeacher(int id, string name)
: base(id, name)
{
}
/// <summary>
/// 擴展方法，護膚的方法
/// </summary>
public void SkinCare()
{
Console.WriteLine(string.Format(@"{0} 老師用香奈兒護膚霜護膚。", this.Name));
}
}
public class FiveStarsHotel
{
/// <summary>
/// 重載
/// </summary>
public void Welcome(MrTeacher mTeacher)
{
Console.WriteLine(@"先生，歡迎光臨！");
}
/// <summary>
/// 重載
/// </summary>
public void Welcome(MisTeacher misTeacher)
{
Console.WriteLine(@"女士，歡迎光臨！");
}
}
}
using System;
namespace YYS.CSharpStudy.MainConsole
{
public class YSchool
{
private int id = 0;
private string name = string.Empty;
public int ID
{
get
{
return this.id;
}
}
public string Name
{
get
{
return name;
}
}
public YSchool()
{
this.id = 0;
this.name = @"清華大學附中";
}
public YSchool(int id, string name)
{
this.id = id;
this.name = name;
}
/// <summary>
/// 構造器
/// </summary>
public YSchool(int id)
{
this.id = id;
this.name = @"陝師大附中";
}
}
public class YTeacher
{
private int id = 0;
private string name = string.Empty;
private YSchool school = null;
private string introDuction = string.Empty;
private string imagePath = string.Empty;
public int ID
{
get
{
return id;
}
}
public string Name
{
get
{
return name;
}
}
public YSchool School
{
get
{
if (school == null)
{
school = new YSchool();
}
return school;
}
set
{
school = value;
}
}
public string IntroDuction
{
get
{
return introDuction;
}
set
{
introDuction = value;
}
}
public string ImagePath
{
get
{
return imagePath;
}
set
{
imagePath = value;
}
}
/// <summary>
/// 構造器
/// </summary>
public YTeacher(int id, string name)
{
this.id = id;
this.name = name;
}
/// <summary>
/// 構造器
/// </summary>
public YTeacher(int id, string name, YSchool school)
{
this.id = id;
this.name = name;
this.school = school;
}
/// <summary>
/// 給學生講課的方法
/// </summary>
public void ToTeachStudents()
{
Console.WriteLine(string.Format(@"{0} 老師教育同學們： Good Good Study,Day Day Up!", this.name));
}
/// <summary>
/// 懲罰犯錯誤學生的方法
/// </summary>
/// <param name="punishmentContent"></param>
public void PunishmentStudents(string punishmentContent)
{
Console.WriteLine(string.Format(@"{0} 的{1} 老師讓犯錯誤的學生 {2}。", this.School.Name, this.name, punishmentContent));
}
}
public class MrTeacher : YTeacher
{
public MrTeacher(int id, string name)
: base(id, name)
{
}
/// <summary>
/// 擴展的方法，刮胡子方法。
/// </summary>
public void Shave()
{
Console.WriteLine(string.Format(@"{0} 老師用飛科剃須刀刮胡子。",this.Name));
}
}
public class MisTeacher : YTeacher
{
public MisTeacher(int id, string name)
: base(id, name)
{
}
/// <summary>
/// 擴展方法，護膚的方法
/// </summary>
public void SkinCare()
{
Console.WriteLine(string.Format(@"{0} 老師用香奈兒護膚霜護膚。", this.Name));
}
}
public class FiveStarsHotel
{
/// <summary>
/// 重載
/// </summary>
public void Welcome(MrTeacher mTeacher)
{
Console.WriteLine(@"先生，歡迎光臨！");
}
/// <summary>
/// 重載
/// </summary>
public void Welcome(MisTeacher misTeacher)
{
Console.WriteLine(@"女士，歡迎光臨！");
}
}
}[csharp]
using System;
namespace YYS.CSharpStudy.MainConsole
{
class Program
{
static void Main(string[] args)
{
FiveStarsHotel hotel = new FiveStarsHotel();
MrTeacher mrTeacher = new MrTeacher(1, @"牛轟轟");
Console.WriteLine(@"牛轟轟 來了");
hotel.Welcome(mrTeacher);//男老師進門
MisTeacher misTeacher = new MisTeacher(2, @"郝漂靓");
Console.WriteLine(@"郝漂靓 來了");
hotel.Welcome(misTeacher);//女老師進門
Console.ReadKey();
}
}
}
using System;
namespace YYS.CSharpStudy.MainConsole
{
class Program
{
static void Main(string[] args)
{
FiveStarsHotel hotel = new FiveStarsHotel();
MrTeacher mrTeacher = new MrTeacher(1, @"牛轟轟");
Console.WriteLine(@"牛轟轟 來了");
hotel.Welcome(mrTeacher);//男老師進門
MisTeacher misTeacher = new MisTeacher(2, @"郝漂靓");
Console.WriteLine(@"郝漂靓 來了");
hotel.Welcome(misTeacher);//女老師進門
Console.ReadKey();
}
}
}
結果：
作者：yysyangyangyangshan
