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：