// -------------------------------------------------------------------------
// shape.cpp - classe para representacao de figuras geometricas planas.
// -------------------------------------------------------------------------
// Criado:     31-Out-1999     Márcio Santi
//
// Modificado:
// -------------------------------------------------------------------------
#include <math.h>
#include <iostream.h>

// -------------------------------------------------------------------------
// Simbolos auxiliares:
//
enum
{
  CIRCLE = 1,
  RECTANGLE,
};

typedef struct
{
  double x,y;
} Point;

const double PI = 3.14159265358979323846;

// -------------------------------------------------------------------------
// Definicao da classe Shape:
//
class Shape
{
 protected:
  int type;   // Tipo da figura 

 public:
                 Shape(void) { cout << "Shape\n"; }
  virtual       ~Shape(void) { cout << "~Shape\n"; }
          int    GetType(void) { return type; }
  virtual double GetArea(void) = 0;
  virtual void   Read(void) = 0;
  virtual void   Print(void) = 0;
};

// -------------------------------------------------------------------------
// Definicao da classe Circle:
//
class Circle : public Shape
{
 protected:
  Point  cnt;   // Centro 
  double rad;   // Raio 

 public:
         Circle(void);
         Circle(Point, double);
        ~Circle(void) { cout << "~Circle\n"; }
  double GetArea(void){ return PI*rad*rad; } 
  void   Read(void);
  void   Print(void);
};

// ================================= Circle ================================

Circle :: Circle(void)
{ 
  cout << "Circle\n";
  type = CIRCLE; 
  cnt.x = cnt.y = 0.0; 
  rad = 1.0;
}

// ================================= Circle ================================

Circle :: Circle(Point c, double r)
{ 
  cout << "Circle\n";
  type = CIRCLE; 
  cnt  = c; 
  rad  = r; 
}

// ================================== Read =================================

void Circle :: Read(void)
{ 
  cin >> cnt.x >> cnt.y >> rad;
}

// ================================== Print ================================

void Circle :: Print(void)
{ 
  cout << "Circle:\n";
  cout << "Center = (" << cnt.x << ", " << cnt.y << ")\n";
  cout << "Radius = " << rad << "\n";
}

// -------------------------------------------------------------------------
// Definicao da classe Rectangle:
//
class Rectangle : public Shape
{
 protected:
  Point  p0;    // Canto inferior esquerdo 
  double wdt;   // Largura 
  double hgt;   // Altura 

 public:
         Rectangle(void);
         Rectangle(Point, double, double);
        ~Rectangle(void) { cout << "~Rectangle\n"; }
  double GetArea(void){ return wdt*hgt; } 
  void   Read(void);
  void   Print(void);
};

// ================================ Rectangle ==============================

Rectangle :: Rectangle(void)
{ 
  cout << "Rectangle\n";
  type = RECTANGLE; 
  p0.x = p0.y = 0.0; 
  wdt = hgt = 1.0;
}

// ================================ Rectangle ==============================

Rectangle :: Rectangle(Point p, double w, double h)
{ 
  cout << "Rectangle\n";
  type = RECTANGLE; 
  p0  = p; 
  wdt = w; 
  hgt = h; 
}

// ================================== Read =================================

void Rectangle :: Read(void)
{ 
  cin >> p0.x >> p0.y >> wdt >> hgt;
}

// ================================== Print ================================

void Rectangle :: Print(void)
{ 
  cout << "Rectangle:\n";
  cout << "Point = (" << p0.x << ", " << p0.y << ")\n";
  cout << "Width  = " << wdt << "\n";
  cout << "Height = " << hgt << "\n";
}