这是放大10倍后的用数值微分法生成直线的程序-This is the enlarged 10 times the numerical differential method to create line procedures

直线的三种画法，中点画线，数值微分，还有别的画法。-Three draw a straight line method, in stipple line, numerical differentiation, as well as other painting.

图形学上机实验，用三种算法画线。包括Bresenham画线算法、中点画线和数值微分画线算法-Graphics on an experiment with three algorithms draw the line. Bresenham line algorithm, the dotted line and numerical differential line drawing algorithm

图形学画直线方法，基于VC的直线光栅扫描转换算法实现。分别实现数值微分算法和Bresenham算法。-Graphics drawing a straight line method, based on VC convert raster scan line algorithm. Respectively, to achieve numerical differentiation algorithm and Bresenham algorithm.