*/
        double length()const;
        /**
         * Returns the points along the line.
         */
        std::vector<Point> getPoints()const;
};
class BoundedConstruct{
    public:
        /**
         * Obtain an area(or as near an estimate as possible)
         */
        virtual double getArea()const=0;
};
class Circle:public Shape{
class Circle:public Shape,public BoundedConstruct{
public:
    /**
     * The center of the circle.
     */
    Point thing;
    /**
     * The radius of the circle (A.K.A the distance between the center and any

    /**
     * Finds the intersection between this circle and this circle.
     */
    void intersectionPoint(const Circle& b,int &n,std::vector<Point> &output)const;
    /**
     * Finds the intersection between the a line and the boundary of the
     * circle, faster than the naive Shape.intersectionPoint
     */:w
     */

    void intersectionPoint(const Line &b,int &n, std::vector<Point> &output)const;
    /**
     * Returns true if the point is very nearly on the boundary of the circle
     * (EPSILON in this case is 0.005).
     * Guaranteed to not modify any parameters or objects.
     */
    bool isOnCircle(const Point &i)const;
    /**
     * Returns true if the point is very nearly on the boundary of the circle,
     * within an error specified by the caller.
     *
     * Guaranteed to not modify parameters or objects.
     */
    bool isOnCircle(const Point &i,double error)const;
    /**
     * Returns an outline of points roughly in the shape of the circumferance
     * of the circle
     */
    std::vector<Point> getPoints()const;
    double getArea()const;
};


class Polygon:public Shape{
class Polygon:public Shape,public BoundedConstruct{
    /**
     * The points which make up the endpoints of the line segments of the
     * polygon.
     */
    std::vector<Point> points;
    public:
    Polygon();
    ~Polygon();
    /**
     * Obtains a point cloud roughly in the shape of the polygon.
     */
    std::vector<Point> getPoints()const;
    /**
     * Add a point to end of the polygon(connected to the first point and the
     * last point previously specified).
     */
    void addPoint(const Point &i);
    double getArea()const;
};
    
#endif