ShapesDetector

class Shape {
public:
 virtual double area() = 0;
};
class Ellipse : public Shape { // Овал
public:
 double area() override;
};
class Circle : public Ellipse { // Круг
public:
 double area() override;
};
class Rectangle : public Shape { // Прямоугольник
public:
 double area() override;
};
class Square : public Rectangle { // Квадрат
public:
 double area() override;
};

bool IsCircle(const Shape& shape);
bool IsEllipse(const Shape& shape);
bool IsSquare(const Shape& shape);
bool IsRectangle(const Shape& shape);

bool IsCircle(const Shape& shape){
 
    try
    {
        [[maybe_unused]]
        const Circle& obj = dynamic_cast<const Circle&> (shape);
        return true;
    }
    catch(const std::bad_cast& e)
    {
        return false;
    }
 
}
int main()
{
    std::cout << std::boolalpha << IsCircle(Circle()) << "\n";
}