//Prototype.h
#ifndef _PROTOTYPE_H_
#define _PROTOTYPE_H_
class Prototype{
 public:
 virtual ~Prototype();
 virtual Prototype* Clone() const = 0;
 protected:
 Prototype();
 private:
};
class ConcretePrototype:public Prototype{
 public:
 ConcretePrototype();
 ConcretePrototype(const ConcretePrototype& cp);
 ~ConcretePrototype();
 Prototype* Clone() const;
 protected:
 private:
};
#endif //~_PROTOTYPE_H_

//Prototype.cpp
#include "Prototype.h"
#include <iostream>
using namespace std;
Prototype::Prototype(){
}
Prototype::~Prototype(){
}
Prototype* Prototype::Clone() const{
 return 0;
}
ConcretePrototype::ConcretePrototype(){
}
ConcretePrototype::~ConcretePrototype(){
}
ConcretePrototype::ConcretePrototype(const ConcretePrototype& cp){
 cout<<"ConcretePrototype copy ..."<<endl;
}
Prototype* ConcretePrototype::Clone() const{
 return new ConcretePrototype(*this);
}

//main.cpp
#include "Prototype.h"
#include <iostream>
using namespace std;
int main(int argc,char* argv[]){
 Prototype* p = new ConcretePrototype();
 Prototype* p1 = p->Clone();
 return 0;
}

namespace Prototype_DesignPattern
{
 using System;

 // Objects which are to work as prototypes must be based on classes which 
 // are derived from the abstract prototype class
 abstract class AbstractPrototype 
 {
  abstract public AbstractPrototype CloneYourself();
 }

 // This is a sample object
 class MyPrototype : AbstractPrototype 
 {
  override public AbstractPrototype CloneYourself()
  {
   return ((AbstractPrototype)MemberwiseClone());
  }
  // lots of other functions go here!
 }

 // This is the client piece of code which instantiate objects
 // based on a prototype. 
 class Demo 
 {
  private AbstractPrototype internalPrototype;

  public void SetPrototype(AbstractPrototype thePrototype)
  {
   internalPrototype = thePrototype;   
  }

  public void SomeImportantOperation()
  {
   // During Some important operation, imagine we need
   // to instantiate an object - but we do not know which. We use
   // the predefined prototype object, and ask it to clone itself. 

   AbstractPrototype x;
   x = internalPrototype.CloneYourself();
   // now we have two instances of the class which as as a prototype
  }
 }

 /// <summary>
 /// Summary description for Client.
 /// </summary>
 public class Client
 {
  public static int Main(string[] args)
  {      
   Demo demo = new Demo();
   MyPrototype clientPrototype = new MyPrototype();
   demo.SetPrototype(clientPrototype);
   demo.SomeImportantOperation();

   return 0;
  }
 }
}

using System;

class ShallowCopy : ICloneable
{
 public int[] v = {1,2,3};

 public Object Clone()
 {
 return this.MemberwiseClone();
 }

 public void Display()
 {
 foreach(int i in v)
  Console.Write( i + ", ");
 Console.WriteLine();
 }
}

class Client
{
 public static void Main()
 {
 ShallowCopy sc1 = new ShallowCopy();
 ShallowCopy sc2 = (ShallowCopy)sc1.Clone();
 sc1.v[0] = 9;

 sc1.Display();
 sc2.Display();
 }
}

using System;

class DeepCopy : ICloneable
{
 public int[] v = {1,2,3};

 // 默认构造函数
 public DeepCopy()
 {
 }

 // 供Clone方法调用的私有构造函数
 private DeepCopy(int[] v)
 {
 this.v = (int[])v.Clone();
 }

 public Object Clone()
 {
 // 构造一个新的DeepCopy对象，构造参数为
 // 原有对象中使用的 v 
 return new DeepCopy(this.v);
 }

 public void Display()
 {
 foreach(int i in v)
  Console.Write( i + ", ");
 Console.WriteLine();
 }
}

class Client
{
 public static void Main()
 {
 DeepCopy dc1 = new DeepCopy();
 DeepCopy dc2 = (DeepCopy)dc1.Clone();
 dc1.v[0] = 9;

 dc1.Display();
 dc2.Display();
 }
}