LRParser.exe 是语法分析器，运行时必须传入syntax文件和对应的action文件，这两个文件必须是对应的，否则运行结果不可预料。运行停止后可以使用 “？” 命令来查询支持哪些 Command。例如用 result 命令来打印分析后的语法树。-LRParser.exe is the parser, run-time files and syntax must be introduced into the corresponding action document, which corresponds to the two documents must be, otherwise unpredictable results. Can be used to stop running after the " ?"　Command to query What Command. For example, analysis of result after the command to print the syntax tree.