词法分析程序 程序当前目录里自己建立一个文本文档，取名为infile.txt,所有需要分析的程序都写在此文本文档里，程序的结尾以\"@\"标志符结束。运行词法分析程序，程序结果输出到文件名为outfile.txt的文件中,此文件为自动生成。-lexical analysis Procedure current directory to establish his own version of a document, named infile.txt, all need to analyze th