对给定的文法消除左递归。

输入已经消除左递归的以及提取公共左因子的LL(1)文法，再输入相应的表达式，若分析成功，则在递归输出过程中输出"acc",若不成功，则有相应的报错以及位置指名。注意，要把同一个非终结符的产生式分成单个输入。他会自动计算first,follow,预测分析表的构造，但并不输出。-importation has been eliminated and left recursive public from the left-LL (1) grammar, further importation of the corresponding expression, if the analysis is successful, the output of the recursive process output "belongs", if successful, there were errors and the corresponding location named. Attention, we should end with a non-escalation of production into a single input. He will be automatically calculated first, follow, and predicting and analyzing the table structure, but does not export.

算符优先语法分析器.-operator priority parser.

C编译器 ,简单的一个C语言的编译器。-C compiler, a simple C language compiler.

一个很号用的词法分析程序，望能对想熟悉编译原理的同仁有一定的帮助，谢谢支持-one of the very lexical analysis procedures can look familiar to colleagues compiler theory can help, thank you support

一个真正的好软件可以查看内存的好软件- Genuine good software may examine the memory good software

如果有人学习单片机，不如msp430，可以看看这些资料，对其学习很有用 -If someone learning single-chip, it is better to msp430, can look at such information useful to their learning

#include

词法分析器：源程序的运行方式： 运行程序 输入一个已存在的文本文档的文件名。如：input.txt 如果要对整个程序进行语法分析，则按‘y’键，否则按‘n’键 如果要对程序进行语法分析，则按‘y’键，否则按‘n’键 程序结束-lexical analyzer : the source of the mode of operation : the importation of operational procedures already exist in a text file in the file name. Such as : input.txt if the entire procedure syntax analysis, the provision "y" button, or by the "n" key to the procedure syntax analysis, the provision "y" button, or by the "n" key end of the program

编译原理的词法预处理- The translation principle morphology pretreats

可以求你需要的汇率转换- May you need in order to the exchange rate transforms