C++中多继承和类型转换

#include "stdafx.h"



struct IX

{

    virtual void FX() = 0;

};



struct IY

{

    virtual void FY() = 0;

};



class CA:

    public IX,

    public IY

{

    virtual void FX() 

    {

        printf("CA->FX()\n");

    }

    virtual void FY()

    {

        printf("CA->FY()\n");

    }



};



class CB:

    public CA

{

    virtual void FX() 

    {

        printf("CB->FX()\n");

    }

};









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

{

    CA * pA = new CA;

    CB * pB = new CB;



    //多重继承和类型转换效果比较

    printf("address of CA: %x\n", pA);

    IX * px = pA;

    IY *py = pA;

    printf("IX address of CA: %x\n", px);

    printf("IY address of CA: %x\n", py);



    px->FX();

    px = pB;

    px ->FX();



    py->FY();

    py = pB;

    py ->FY();



    return 0;

}

运行结果：