创建一个mydll动态链接库，在其中编写一个函数DrawTree()，实现一个递归分形树。-Mydll create a dynamic link library, write a function in which DrawTree (), implement a recursive fractal tree.

基于PN序列的同步仿真链路,收端算法为接受序列与本地序列求滑动相关,(Simulation based on PN sequence synchronization of link, and receiving algorithm for sequence related to the local sequence and sliding,)