When do I need to declare my own destructor?

Question

class Point    
{
public:
    float x,y;
    Point() {}
    Point(float,float);
    Point operator + (Point);
    Point operator * (double);
    void rotate_p(float)         


        

Answer 1

Destructor's main purpose is to release used memory from heap or to delete links to other objects, etc. You do not allocate memory from heap here, you do not make any relations between objects, so no destructor is needed.