一个简单的绘图工具的实现 可以参考学习图形学基本算法-a simple drawing tools can refer to the realization of the basic graphics learning algorithm

一段使用C语言编写的二维函数图形绘制程序，可在tuoboC 上运行，绘制的函数图形清晰、美观，可供C语言爱好者参考学习-Using the C language written in a two-dimensional function graph drawing program can be run in tuoboC, graphics functions to draw a clear, beautiful, available for C language enthusiasts ref