cppPoinToPoint3DAndBoolConversion

#include <iostream>

class Point3D;

class Point
{
    int x;
    int y;
public:
    Point() = default;
    Point(int pX, int pY) : x{ pX }, y{ pY } {}
    Point& setX(int pX) { x = pX; return *this; }
    Point& setY(int pY) { y = pY; return *this; }

    void showPoint() const
    {
        std::cout << '(' << x << ',' << y << ')';
    }

    explicit operator bool() const { return x and y; }
    explicit operator Point3D() const;
};

class Point3D
{
    int x;
    int y;
    int z;
public:
    Point3D() = default;
    Point3D(int pX, int pY, int pZ) : x{ pX }, y{ pY }, z{ pZ } {}
    Point3D& setX(int pX) { x = pX; return *this; }
    Point3D& setY(int pY) { y = pY; return *this; }
    Point3D& setZ(int pZ) { z = pZ; return *this; }

    void showPoint() const
    {
        std::cout << '(' << x << ',' << y << ',' << z << ')';
    }

    explicit operator bool() const { return x and y and z; }
    explicit operator Point() const;
};

Point::operator Point3D() const { return { x,y,0 }; }
Point3D::operator Point() const { return { x, y }; }

int main()
{
    const int pointsCount{ 3 };
    Point points[pointsCount]{ {0,0}, {28,29}, {0,26} };

    bool isZero{};

    for (auto point{ points }, pointsEnd{ points + pointsCount }; point != pointsEnd; ++point)
    {
        //isZero = (bool)(*point);
        if (!*point)
        {
            point->showPoint();
            std::cout << '\n';
        }
        else
        {
            std::cout << "Zero Point detected!\n";
        }
    }

    return 0;
}