一个简单词法分析器

C++ C 词法分析器，编译原理， 运行时输入文件（input.txt）路径，文件内容为{}BEGIN FOR(I=0 I

前些天写了个小语言的词法分析程序，因为前些天在VC知识库看到一个pascal词法分析的程序，觉得写得挺复杂的。其实词法分析程序的原理都是一样的，所以我想只要搞明白了简单的词法分析程序，再写复杂的就不难了，无非是多加几个关键字，多写几个条件判断语句而已。词法分析是编译程序的基础，也是最简单的。好，现在让我们看程序吧。 先让我们看看这个小语言的文法吧-few days ago wrote a small language lexical analysis procedures, because the other day in the knowledge base to see a VC pascal lexical analysis procedures, find that quite complex. In fact, lexical analysis procedure is the same principle, I think if you understood a simple lexical analysis procedure to write complex it is not difficult, is nothing but add a few keywords and writing several conditions judgment statement it. Lexical analysis is the basis of compilers, as well as the most simple. Well, now let us look at the procedures it. Let us look at this small language grammar it

basic c compiler 类似于basic语法的脚本-basic c compiler is similar to basic grammar of the script

C语言编写的简单计算程序的语法分析器，可以识别一定的计算功能-C language prepared by the simple calculation procedure syntax analyzer can identify certain computing capabilities

编译原理教案。西安电子科技大学出版-Compilation Principle lesson plans. Xidian University Press

自己做的一个求集合的小程序，实现十分简单- Own do the script which asks to gather, the realization is extremely simple

Compiler Type Check & Scope Check

数学公式分析- The mathematical formula analyzes

自己开发的c0文法编译器，有详细的设计说明，适用于编译器初学者-C0 own grammar compiler, a detailed design that apply to the compiler for beginners

一个可以反编译程序的源代码，不晓得是否有用哈-Decompile a program