多线程实现PI的输出,只是简单的主辅线程，仅是学习实例，操作系统作业。-PI output multi-threading, simply the main and auxiliary thread, only to learn an instance, the operating system operations.

vb-ole对象批量导出.rar 可以导出 所有类型文件 sysTem.dat c:/1-vb-ole pi liang dao chu

操作系统概念英文版chapter 5 5.39源码。利用线程计算pi值。只能用于linux。(Source code of 5.39 in Operating System Concept. Talk about thread. Linux only.)