text: #ifndef  SHAPE_H
  #define SHAPE_H
  #include<wx/wx.h>
  
  namespace mod10ex
  {
  	class Shape
  	{
  	public:
  
  		Shape(wxDC* dc) : device_context(dc) {}
  		virtual void draw() = 0;
  
  	protected:
  
  		wxDC* device_context;
  	};
  }
  #endif // SHAPE_H