#include <iostream>
#include <string>

using namespace std;

class FormaGeometrica{
  public:
    virtual ~FormaGeometrica() {}
    virtual float perimetro() const = 0;
    virtual float area() const = 0;
    virtual string colore() const { return "blue"; }
    virtual void print() const = 0;
};

class Quadrato: public FormaGeometrica{
  public:
    Quadrato(){myLato=0;}
    Quadrato(float lato){myLato=lato;}
    virtual ~Quadrato(){}
    float lato() const {return myLato;}
    virtual float perimetro() const {return 4*myLato;}
    virtual float area() const {return myLato*myLato;}
    virtual void print() const {
      cout << "Quadrato l=" << lato() << " area " << area() << " colore " <<
        colore() << endl;
    }
  private:
    float myLato;
};

class Circonferenza: public FormaGeometrica{
  public:
    Circonferenza(){myRaggio=0;}
    Circonferenza(float r){myRaggio = r;}
    virtual ~Circonferenza(){}
    float raggio() const {return myRaggio;}
    virtual float perimetro() const {return 4*3.14*myRaggio;}
    virtual float area() const {return 3.14*myRaggio*myRaggio;}
    string colore() const { return "red"; }
    virtual void print() const {
      cout << "Circonferenza r=" << raggio() << " area " << area() << " colore "
        << colore() << endl;
    }
  private:
    float myRaggio;
};

void draw(FormaGeometrica* f) ;

int main () {
  FormaGeometrica *q = new Quadrato(3.);
  FormaGeometrica *circ = new Circonferenza(3.);
  draw(q);
  draw(circ);

  q->print();
  circ->print();

  Circonferenza c(66.);
  cout <<"La circonferenza ha raggio "<<c.raggio()<<" perimetro "<<c.perimetro()<<" e area "<<c.area()<<endl;

  delete q;
  delete circ;

}

void draw(FormaGeometrica* f) {
  cout << "perimetro " << f->perimetro() << " colore " << f->colore() << endl;
}