Introduction - If you have any usage issues, please Google them yourself
The slope of the plot any straight line segments
Design CLine linear class, its data members for the straight line segment of P0 starting point coordinates and end coordinates P1, member function to MoveTo () and LineTo () function.
CLine class LineTo () function USES the midpoint Bresenham algorithm to draw any slope k line segment, including k + up, k > 1, 0 k 1 or less, or less- 1 k or less < < 0 and k- 1 five kinds of situations.
The client area in screen by pressing the left mouse button to choose the starting point of straight line, keep the left mouse button pressed and moving the mouse to another location, bounce the slope of the left key of mouse to draw any straight line segments.
In the dynamic display of the status bar moves the mouse cursor position coordinates.