内部类创建一个内部版本

那有没有什么办法能够解决问题呢？答案是肯定的。以下就通过一个样例来解说这样的模式。
       如果如今要仿真模拟一艘航空母舰。

广义的航空母舰是指“航空母舰战斗群”，如果一支航空母舰战斗群(AVSG)由1艘航母(AircraftCarrier)。1艘补给舰 (DepotShip)，2艘防空导弹驱赶舰(Destroyer)。4艘多功能护卫舰(Frigate)，2艘093核潜艇(NuclearSubmarine)组成，若干舰载机(ShipboardAircraft)和预警机组成。

如今用简单的类来模拟这些战机。

      如果有这样一个航空母舰类和一个舰载机类例如以下：

AircraftCarrier

/* 航空母舰
 * File:   AircraftCarrier.h
 * Author: luowf
 *
 * Created on July 31, 2014, 8:03 PM
 */

#ifndef AIRCRAFTCARRIER_H
#define	AIRCRAFTCARRIER_H

#include "stdafx.h"


class AircraftCarrier {
protected:
    AircraftCarrier();
    AircraftCarrier(const AircraftCarrier& orig);
    virtual ~AircraftCarrier();
    
public:
    void SetName(const string& name)
    {
        m_name = name;
    }
    
    string GetName()
    {
        return m_name;
    }
    
private:
    string m_name;
    
    friend class CVSG;
};

#endif	/* AIRCRAFTCARRIER_H */

/* 舰载机
 * File:   ShipboardAircraft.h
 * Author: luowf
 *
 * Created on August 1, 2014, 9:26 AM
 */

#ifndef SHIPBOARDAIRCRAFT_H
#define	SHIPBOARDAIRCRAFT_H

#include "stdafx.h"

class ShipboardAircraft {
protected:
    ShipboardAircraft();
    ShipboardAircraft(const ShipboardAircraft& orig);
    virtual ~ShipboardAircraft();
    
public:
    void SetName(const string& name)
    {
        m_name = name;
    }
    
    string GetName()
    {
        return m_name;
    }
    
private:
    string m_name;
    
    friend class CVSG;
};

#endif	/* SHIPBOARDAIRCRAFT_H */

CVSG.h

/* 航空母舰战斗群
 * 
 * File:   CVSG.h
 * Author: luoweifu
 *
 * Created on July 31, 2014, 7:49 PM
 */

#ifndef CVSG_H
#define	CVSG_H

#include "stdafx.h"
#include <string>

using namespace std;

class AircraftCarrier;
class ShipboardAircraft;

class CVSG {
protected:
    CVSG();
    CVSG(const CVSG& orig);
    virtual ~CVSG();
public:
    //创建航母
    AircraftCarrier* CreateAircraftCarrier();
    //加入舰载机
    ShipboardAircraft* AddShipboardAircraft();
    void SetName(const string& name);
    string GetName();
private:
    typedef vector<ShipboardAircraft*>  ShipAircVec;
    ShipAircVec            m_vecShipboardAircraft;
    AircraftCarrier*      m_pAircraftCarrier;
    string                m_name;
};

#endif	/* CVSG_H */

CVSG.cpp

/* 航空母舰战斗群
 * 
 * File:   CVSG.cpp
 * Author: luoweifu
 * 
 * Created on July 31, 2014, 7:49 PM
 */

//==================================================

#include "CVSG.h"
#include "AircraftCarrier.h"
#include "ShipboardAircraft.h"

//==================================================

CVSG::CVSG() : m_pAircraftCarrier(NULL), m_name("") {
    m_vecShipboardAircraft.empty();
}

CVSG::CVSG(const CVSG& orig) {
}

CVSG::~CVSG() {
    if(m_pAircraftCarrier != NULL)
    {
        delete m_pAircraftCarrier;
        m_pAircraftCarrier = NULL;
    }
    for(ShipAircVec::iterator itr = m_vecShipboardAircraft.begin(); itr != m_vecShipboardAircraft.end(); itr ++)
    {
        if(*itr != NULL)
        {
            delete *itr;
            *itr = NULL;
        }
    }
    m_vecShipboardAircraft.clear();
}

AircraftCarrier* CVSG::CreateAircraftCarrier() {
    if(m_pAircraftCarrier == NULL)
    {
        m_pAircraftCarrier = new AircraftCarrier();
    }
    return m_pAircraftCarrier;
}

ShipboardAircraft* CVSG::AddShipboardAircraft() {
    ShipboardAircraft* pShipboardAircraft = new ShipboardAircraft();
    if(pShipboardAircraft != NULL)
    {
        m_vecShipboardAircraft.push_back(pShipboardAircraft);
    }
    return pShipboardAircraft;
}

void CVSG::SetName(const string& name)
{
    m_name = name;
}

string CVSG::GetName()
{
    return m_name;
}