ergydfhgdfhggfhg 一．实验目的

二．实验内容

三、程序简要说明







原 文 : C语言词法分析器的设计与实现

一．实验目的：

1．强化对系统软件综合工程实现能力、规划能力的训练；

2．加强对词法分析原理、方法和基本实现技术的理解；

二．实验内容：

用C语言(或 C++ )作为宿主语言完成：

C语言(ANSI C或turbo C 2.0)词法分析器的设计和实现。

三、程序简要说明：

1、属性字说明：

共9种

KEYWORD: 关键字

"auto","break","case","char","const","continue",

"default","do","double","else","enum","extern",

"float","for","goto","if","int","long","register",

"return","short","signed","sizeof","static","struct",

"switch","typedef","union","unsigned","void",

"volatile","while","include"，"define"

共34个

详见IsKeyWord（）函数

NUMBER： 数字

包括十进制整数，八进制整数，二进制整数，十六进制整数

还可返回几种错误

详见IsNumber（）函数

CONSTANT： 常量

宏定义标识符，不识别C++关键字const，简单处理一层宏定义。

详见IsDefined（）函数

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关键词 : 计算机 编译原理 c语言 词法分析器-ergydfhg gfhg one. Experiment 2. Experiment 3, procedures brief descr iption of the original : C language lexical analyzer Design and Implementation of a. The experiment : 1. To strengthen the integrated system software engineering, planning capacity of training; 2. Lexical analysis on principle, and basic understanding of the technology; 2. Experiment : C (or C) as the host language completed : C language (ANSI C or Turbo C 2.0) lexical analyzer design and implementation. 3, brief descr iption of procedures : 1, the word attribute : a total of nine species KEYWORD : keyword "auto" "break" and "case", "char", "const", "continue", "default", "do", "double", "else", "enum" "ext