public CRectangle(int pen_width, Color pen_color, TPoint left_top_corner, int width, int height) : base(pen_width, pen_color)
{
this.left_top_corner = left_top_corner;
this.width = width;
this.height = height;
}
public CLine(int pen_width, Color pen_color, TPoint point_a, TPoint point_b) : base(pen_width, pen_color)
{
this.point_a = point_a;
this.point_b = point_b;
}
public CEllipse(int pen_width, Color pen_color, TPoint center, int radius_a, int radius_b) : base(pen_width, pen_color)
{
this.center = center;
this.radius_a = radius_a;
this.radius_b = radius_b;
}
