#include<iostream>
#include<ctime>
#include<cstdlib>
#include <clocale>


#define interface struct
//#include"Header.h"

using namespace std;


interface IX {
    virtual void _stdcall FX1() = 0;
    virtual void _stdcall FX2() = 0;
};
class CA :public IX {
public:
    virtual void _stdcall FX1() { cout << "CA::FX1" << endl; }
    virtual void _stdcall FX2() { cout << "CA::FX2" << endl; }
};
class CB :public IX {
public:
    virtual void _stdcall FX1() { cout << "CB::FX1" << endl; }
    virtual void _stdcall FX2() { cout << "CB::FX2" << endl; }
};
void ff(IX& pix)
{
    pix.FX1();
    pix.FX2();
}
int main()
{
    setlocale(LC_ALL, "rus");

    CA pA;
    CB pB;
    IX* pix;

    pix = &pA;
    pix->ff(); //вызов методов CA




    pix = &pB;
    ff(*pix); //вызов методов СB

    system("pause");
    return 0;
}