以c++为服务器,flex为客户端建立socket利用json通信可多人通信,是学习的好例子-To c++ for the server, flex client can establish communication over socket communication using json is a good example of learning

按一定规则读取文件内容，并输出；这是把flex文件转换成C编码，可在C/C++文件中直接调用-Read the contents of the file according to certain rules, and outputs This is the flex file into C code can be C/C++ files directly call

使用工具实现C/C++语言词法分析器： 输入：C/C++源代码文件，即后缀为c/cpp的文件。 输出：后缀为tok的文本性文件。 实现功能：使用词法分析的自动生成工具Flex生成C/C++语言的词法分析器(The use of tools to implement the C/C++ language lexical analyzer: Input: C/C++ source code file, that is, a file with a suffix of c/cpp. Outp