IFS是分形学的组成部分，输入几行代码做成ifs文件，就可以做出可画出逼真的画面。适于广大分形爱好者研究。本人自己写了些例子在里面。-IFS is an integral part of the fractal, enter a few lines of code make ifs file, you can make a realistic picture can be drawn. For the majority of fans of the fractal. I wrote out so

本程序实现的是koch snow分形，为了雪花显示明显，设置递归次数n=4，运行后会出现一个雪花状的画面。-the koch snow can be developed in this cpp.