class Figure
{
};
class Square : public Figure
{
private:
    double a;
public:
    double calculateSquare() override
    {
        return a * a;
    }
    double calculatePerimeter()
    {
        return 4 * a;
    }
    Square(int a)
    {
        this->a = a;
    }
    void setA(double a){
        this->a = a;
    }
    double getA(){
        return a;
    }
};
class Circle : public Figure
{
private:
    double radius;
public:
    double calculateSquare()
    {
        return M_PI * radius * radius;
    }
    double calculatePerimeter()
    {
        return 2 * M_PI * radius;
    }
    Circle(double r)
    {
        radius = r;
    }
    void setRadius(double r){
        this->radius = r;
    }
    double getRadius(){
        return radius;
    }
};
class Rectangle : public Figure
{
private:
    double a;
    double b;
public:
    double calculateSquare()
    {
        return a * b;
    }
    double calculatePerimeter()
    {
        return 2 * a + 2 * b;
    }
    Rectangle(double a, double b)
    {
        this->a = a;
        this->b = b;
    }
    void setA(double a){
        this->a = a;
    }
    double getA(){
        return a;
    }
    void setB(double b){
        this->b = b;
    }
    double getB(){
        return b;
    }
};
int main()
{
    Rectangle Pr(1, 2.0);
    Circle Kr(1);
    Square Kv(2);
    Figure* mas[3] = { &Pr,&Kr,&Kv };
    Figure ** arr = new Figure * [3];
    cout <<"Rectangle: " << endl <<"The perimeter of the rectangle is: "<< mas[0]->calculatePerimeter() << " (m)" << endl << "The area of ​​the rectangle is: " << mas[0]->calculateSquare() << " (m)" << endl;
    cout <<"Circle: "<< endl <<"The perimeter of the circle is: " << mas[1]->calculatePerimeter() << " (m)" << endl <<"The area of ​​the circle is: " << mas[1]->calculateSquare() << " (m)" << endl;
    cout <<"Square: "<< endl << "The perimeter of the square is: " << mas[2]->calculatePerimeter() << " (m)" << endl << "The area of ​​the square is: "<< mas[2]->calculateSquare() << " (m)" << endl;