C++编的如何为派生类提供写时拷贝语义的引用计数的小程序哦-C series of the derived class how to write copy for the reference counting semantics of small programs oh

mapreduce算法的phoenix架构实现和一个使用实例，用mapreduce算法对一个输入的文本文件中的单词计数。-mapreduce algorithm phoenix architecture implementation and a use case, use mapreduce algorithm a input text file of the word count.