Prototype 提供了自我複製的功能

• Prototype 模式提供了一個通過已存在物件進行新物件建立的介面(Clone),Clone()實現和具體的實現語言相關,在 C++中我們將通過拷貝建構函式實現之。

#include"prototype.h"
#include<iostream>
using namespace std;

int main()
{
    prototype *p = new ConcretePrototype();
    prototype *p1 = p->Clone();
    system(
 
"pause");
    return 0;
}

#pragma once
#include<iostream>
using namespace std;

class prototype
{
public:
    
    virtual ~prototype();
    virtual prototype* Clone() const = 0;

    protected :
    prototype();
};

class ConcretePrototype:public prototype
{
public:
    ConcretePrototype();
    
 
~ConcretePrototype();
    ConcretePrototype(const ConcretePrototype &cp);

    prototype* Clone() const;
};

#include "prototype.h"



prototype::prototype()
{
}


prototype::~prototype()
{
}

ConcretePrototype::ConcretePrototype()
{
}

ConcretePrototype::~ConcretePrototype()
{
}

ConcretePrototype::ConcretePrototype(
 
const ConcretePrototype & cp)
{
    cout << "concretePrototype copy" << endl;
}

prototype * ConcretePrototype::Clone() const
{
    return new ConcretePrototype(*this);
}