#include <iostream>
using namespace std;

class Point
{
private:
    int X;
    int Y;
public:
    Point() {}
    Point(int x, int y) : X(x), Y(y) {}

    const int getX() { return X; }
    const int getY() { return Y; }
    virtual ~Point() {}
    virtual void printX() { cout << "X=" << X << endl; }
    virtual void printY() { cout << "Y=" << Y << endl; }

};

class Point3D :public Point
{
private:
    int Z;
public:
    Point3D()
        :Point()
    {}
    Point3D(int x, int y, int z)
        :Point(x, y), Z(z)
    {}
    const int getZ() { return Z; }
    virtual ~Point3D() {}
    virtual void printZ() { cout << "Z=" << Z << endl; }
    virtual void fun() { cout << "fun" << endl; }

};

int main()
{
    typedef void(*Funptr)();
    Point point(1, 2);
    Point3D point3D(1, 2, 3);
    Point3D* p3D = &point3D;
    void*** _p3D = (void***)&point3D;
    void** vfptr3D = *_p3D;
    int** ptr3D = (int**)vfptr3D;
    while (*ptr3D != NULL)
    {
        cout << *ptr3D << endl;
        ptr3D++;
    }
    cout << "--------------------------" << endl;
    Point* p = &point;
    void*** _p = (void***)&point;
    void** vfptr = *_p;
    int** ptr = (int**)vfptr;
    while (*ptr != NULL)
    {
        cout << *ptr << endl;
        ptr++;
    }
    return 0;
}