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#include <iostream.h>
 
class Shape
{
    public:
        Shape(){}
        ~Shape(){}
        virtual long GetArea() = 0;
        virtual long GetPerim() = 0;
        virtual void Draw() = 0;
    private:
};
 
class Circle:public Shape
{
    private:
        int itsRadius;
 
    public:
        Circle(int radius):itsRadius(radius){}
        ~Circle(){}
        long GetArea(){return 3*itsRadius*itsRadius;}//???
        long GetPerim() {return 6*itsRadius;} //???
        virtual void Draw();
    
};
 
void Circle::Draw ()
{
    cout << "Izobrazen obect klassa Circle! \n";
}
 
class Rectangle:public Shape
{
    private:
        int itsWidth;
        int itsLength;
    public:
        Rectangle(int len, int width)
            :itsLength(len), itsWidth(width){}
        ~Rectangle(){}
         long GetArea(){return itsLength*itsWidth;}
         long GetPerim() {return 2*itsLength + 2*itsWidth;} 
         int GetLength(){return itsLength;}
         int GetWidth(){return itsWidth;}
         void Draw();
};
 
 
void Rectangle::Draw ()
{
    if (GetLength() != GetWidth())
     cout << "Izobrazen obect klassa Rectangle! \n";
        else
            cout << "Izobrazen obect klassa Square! \n";
}
 
 
class Square: public Rectangle
{
    public:
        Square(int len);
        Square(int len, int width);
        ~Square(){}
        long GetPerim(){return 4*GetLength();}
};
 
Square::Square (int len)
        :Rectangle(len, len) {}
 
Square::Square (int len, int width)
        :Rectangle(len,width)
{
    if (GetLength() != GetWidth())
        cout << "Error, not a square ... Rectangle??? \n";
}
 
 
 
int main()
{
    int choice;
    bool fQuit = false;
    Shape *sp;
 
 
    while (!fQuit)
    {
        cout << "[1] Circle; [2] Rectangle; [3] Square; [0] Quit: ";
        cin >> choice;
 
        switch (choice)
        {
        case 0: fQuit = true;
            break;
 
        case 1: 
            sp = new Circle(5);
            cout << "Ploschad = " << sp->GetArea ()<<"\n";
            cout << "Perimetr = " << sp->GetPerim ()<<"\n";
            break;
 
        case 2: 
            sp = new Rectangle(4,6);
            cout << "Ploschad = "<< sp->GetArea () <<"\n";
            cout << "Perimetr = "<< sp->GetPerim() <<"\n";
 
            break;
 
        case 3: 
        /*  sp = new Square(5,5);
            cout << "Ploschad = "<< sp->GetArea () <<"\n";
            cout << "Perimetr = "<< sp->GetPerim() <<"\n";*/
            
            sp = new Square(5);
            cout << "Ploschad = "<< sp->GetArea () <<"\n";
            cout << "Perimetr = "<< sp->GetPerim() <<"\n";
           
        /*    sp = new Square(5,7);
            cout << "Ploschad = "<< sp->GetArea () <<"\n";
            cout << "Perimetr = "<< sp->GetPerim() <<"\n"; */
            break;
 
        default: cout << "Enter a number between 0 and 3" << endl;
            continue;
            break;
        }
        if (!fQuit)
        sp->Draw();
        delete sp;
        sp = 0;
        cout << "\n";
    }
 
    return 0;
}

#include <iostream>
using namespace std;