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C-/C++-Quelltext

#include <iostream>
using namespace std;

class CMath
{
public:
    CMath();
    virtual ~CMath();
    virtual void foo() = 0;
private:

};
class CVector2 : public CMath
{
public:
    CVector2();
    virtual ~CVector2();
    virtual void foo();
    void add(int x,int y);
};
class CVector3 : public CMath
{
public:
    CVector3();
    virtual ~CVector3();
    virtual void foo();
};
int main()
{
    CMath* math;
    math = new CVector2();
    math->foo();
    //add(3,3);//wie soll ich dann die add-funktion aufrufen?

    delete math;
    math = new CVector3();
    math->foo();
    delete math;
    return 0;
}
CMath::CMath()
{
    cout<<"CMath()-Konstruktor"<<endl;
}
CMath::~CMath()
{
    cout<<"CMath()-Destruktor"<<endl;
}
CVector2::CVector2()
{
    cout<<"CVector2-kon"<<endl;
}
CVector2::~CVector2()
{
    cout<<"CVector2-des"<<endl;
}
void CVector2::foo()
{
    cout<<"foo2d"<<endl;
}
void CVector2::add(int x,int y)
{
    cout<<"2d-add"<<x+y<<endl;
}
CVector3::CVector3()
{
    cout<<"CVector3-kon"<<endl;
}
CVector3::~CVector3()
{
    cout<<"CVector3-des"<<endl;
}
void CVector3::foo()
{
    cout<<"foo3d"<<endl;
}