TwoDimensionalFigure is a sub class of Figure and the base class of RectangleFigure and EllipseFigure. A two-dimensional figure can be filled or unfilled. TwoDimensionalFigure has the field m_bFilled with their methods Fill and IsFilled to keep track of the fill status.
class TwoDimensionalFigure : public Figure
{
public:
TwoDimensionalFigure();
TwoDimensionalFigure(const Color& color, BOOL bFilled);
BOOL IsFilled() const {return m_bFilled;}
void Fill(const BOOL bFill) {m_bFilled = bFill;}
void Serialize(CArchive& archive);
private:
BOOL m_bFilled;
};The implementation of Figure is rather straightforward. Remember that each time we introduce a new class to the application we have to include the header file StdAfx.h at the beginning of the implementation file. Otherwise, the application will not work.