#include <iostream>
#include <list>
using std::list;
using std::cout; using std::endl;
#include <string>
using std::string;

class Shape {
public:
  Shape() : color("lavender") {}
  Shape(const string& c) : color(c) {}
  virtual void draw() const = 0;
  float findArea() const { return 0; }
  const string& getColor() const { return color; }
private:
  string color;
};

class Rectangle : public Shape {
public:
  Rectangle(float l, float w) : Shape(), length(l), width(w) {}
  Rectangle(const string& c,  float l, float w) : Shape(c), length(l), width(w) {}
  virtual void draw() const { cout << "I'm a Rectangle" << endl; }
  virtual float findArea() const { return length * width; }
private:
  float length;
  float width;
};

class Circle : public Shape {
public:
  Circle(float r) : radius(r) {}
  Circle(const string& c,  float r) : Shape(c), radius(r) {}
  virtual void draw() const { cout << "I'm a Circle" << endl; }
  virtual float findArea() const { return 3.14159*radius*radius; }
private:
  float radius;
};

void print(const list<Shape*> & l) {
  list<Shape*>::const_iterator ptr = l.begin();
  while ( ptr != l.end() ) {
    (*ptr)->draw();
    ++ptr;
  }
}
    
int main() {
  list<Shape*> shapes;
  Shape *circle = new Circle("Chartreuse", 2);
  Shape *rectangle = new Rectangle("red", 4,3);
  shapes.push_back(circle);
  shapes.push_back(rectangle);
  Shape *x = new Circle(25);
  cout << x->getColor() << endl;
  print(shapes);
  delete circle;
  delete rectangle;
  delete x;
  return 0;
}