多线程快速排序算法，是多线程课程学习中的一个小练习-multi-thread quick sort

Linux: use cmake -DBUILT_32=ON .. to force 32-bit built, -DBUILT_64=ON for 64-bit-Queue - thread-safe - ability to define max number of elements - sort elements into queue - get in O(1), except when filtered (worst case O(n)) - put in O(1)

在大数据文件中，通过多线程的方式，找出前五个出现频率最高的单词，并排序展示-In the big data file, through the multi thread way, find out the first five appear the highest frequency word, and sort display