求编译原理的词法分析器程序

求编译原理的词法分析器程序。
用C语言或是C++语言编写的都可以；
能够对C语言或是c++语言进行词法分析；
具体的分析包括：
标识符、关键字、整常数、字符常数、浮点常数
单界符：＋，－，×，：，…
双界符：/*，:=，…
注释
还有能够进行简单的错误处理。
谢谢！

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推荐答案 2008-12-02

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