If only the copy constructor of a class is explicitly defined then object of that class is not possible to be created from main() function code example

Example: create copy constructor c++

// Copy constructor 
    Point(const Point &p2) {x = p2.x; y = p2.y; } 
  
    int getX()            {  return x; } 
    int getY()            {  return y; } 
};