Александр Ананьев

catch (errors){
            printf("Це не число. Спробуй ще раз\n");
            return in_is_int();
        }

class IShape
{
  public:
    virtual Vector FarthestPointInDirection(Vector direction) = 0; // pure virtual function
};

class Polygon : public IShape{
...
Vector FarthestPointInDirection(Vector direction) override{
....
}
};

Vector support(IShape& a, IShape& b, Vector direction){
 Vector aFar = a.FarthestPointInDirection(direction);
  Vector bFar = b.FarthestPointInDirection(direction);
  return *aFar.Sub(bFar);
}