所上载的是一个用lex与yacc开发的表达式计算器

to maintain address using tree structure

算符优先语法分析器，根据算符优先分析法，将表达式进行语法分析，判断一个表达式是否正确。-operator priority syntax analyzer, according to operator priority analysis, expression for syntax analysis, judgment, an expression is correct.

词法分析,语法分析,文件中有语言的文法,根据文法写出的程序样例,还有根据样例进行词法分析得出的文件-lexical analysis, grammar analysis, the paper is the language grammar, grammar write the program sample, for example under the lexical analysis of documents

很详细的ll1文法编译演示程序,学习编译的极品!-very detailed grammar compiler ll1 Demonstration Program, the study compiled Acura!

DES算法完整源码与调用方法 DES算法完整源码与调用方法-DES algorithm for complete source code to call methods of DES algorithm with complete source code and call the method

一个识别c语言关键字和大小写转换的程序-an identification and case-insensitive language keyword conversion process

一个Pascal子集语言的编译器，将pascal子集语言的源程序存成source.txt文件，经过编译器的处理得到C++语言的code.cpp文件。-Subset of a Pascal language compiler, a subset of the pascal language source.txt Save as source files, compiler after treatment has been C++ Language code.cpp document.

delphi实现的sql解析器，可以对各种sql语句进行解析，产生语法树。-realize the sql parser delphi can parse the various sql statements, resulting in tree grammar.

PASCAL语言子集编译器，足够计算机系的学生交作业用了-PASCAL language subset compiler, the enough computer department s students handed over the work to use