LEX学习 第二节

接着第一节中的第一个示例，我们扩展第二个示例，将词法分析程序扩展为识别不同的词性。 下面是程序示例： %{ /* * 扩展第一个示例以识别其他的词性 * */ %} %% [ \t ]+ /* 忽略空白 */; is | am | are | were | was | be | being | been | do | does | did | will | would | should

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