说明：  2002级计算机科学与技术专业(4-11班) 要求完成下述两个实验： 1、识别小型语言所有单词的词法分析程序设计（4机时） 2、算术表达式文法的递归下降分析程序设计（6机时） 实验一：词法分析器的构造与实现
(2002 Computer Science and Technology (4-11 classes) required to complete the following two experiments : one to identify all small language word lexical analysis procedure design (four aircraft) 2, arithmetic expression of recursive grammar drop design analysis program (6 aircraft) is an autopsy : lexical analyzer Construction and Implementation)