linux下计算PI值，创建线程、互斥锁，可以借鉴一下-PI values ​ ​ calculated under linux, create threads, mutexes, we can draw

计算pi小数点后100位，内含说明文档和详细注释和介绍-After calculating pi decimal 100, containing documentation and detailed notes and presentation

是在linux系统下用c+mpi并行计算pi的程序。-Linux system c+mpi parallel computing pi program.

并行计算PI值的一个小程序，利用循环，精确计算PI值，循环次数越多，PI值计算的结果越精确-PI values of parallel computing in a small program, using cycle accurate calculation of PI values, the more cycles, PI value the more accurate the results