Prototype原型模式

#include "stdafx.h"
#include<iostream>
#include<cstring>
using namespace std;
class Prototype
{
public:
	virtual ~Prototype()
	{
		cout << "~Prototype" << endl;
	}
	virtual Prototype* clone()const = 0;
	virtual void show()const = 0;
};

class ConcreteProtype1 :public Prototype
{
public:
	ConcreteProtype1(int len,char*str)
	{
		_length = len;
		_str = new char[_length];
		strcpy_s(_str, _length, str);
	}
	~ConcreteProtype1()
	{
		delete(_str);
		cout << "~ConcreteProtype" << endl;
	}

	ConcreteProtype1(const ConcreteProtype1& rhs)
	{
		//实现深拷贝
		_length = rhs._length;
		_str = new char[_length];
		if (_str != NULL)
			strcpy_s(_str, _length, rhs._str);
		cout << "copy construct ConcreteProtype1" << endl;
	}
	virtual Prototype* clone()const
	{
		return new ConcreteProtype1(*this);
	}

	virtual void show()const
	{
		cout <<"value:"<< _str << endl;
		cout << "Address:" << &_str << endl;
	}
private:
	int _length;
	char* _str;
};

// PrototypePattern.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include "Prototype.h"


int _tmain(int argc, _TCHAR* argv[])
{

	Prototype* p1 = new ConcreteProtype1(6,"hello");
	Prototype *p2 = p1->clone();
	p1->show();
	p2->show();
	getchar();
	return 0;
}