中点画圆的算法实现，是VC++的源代码，这个算法只是中点画圆的一种而已-Drawcircle midpoint algorithm is VC++ The source code, this algorithm is only a mid-point of no more than drawcircle

用VC编写的一个单文档程序，其中点击文档，托动鼠标可以画圆，点击圆心坐标时，显示所有圆心的位置。-VC prepared using a single document procedures, click on the document, asked to move the computer mouse can drawcircle, click on the center coordinates indicating the location of all the center of a ci