Compilers Principles, Techniques, & Tools (purple dragon book) second edition exercise answers

编译原理（紫龙书）中文第2版习题答案

First, please watch or star this repo, I'll be more happy if you follow me.
Bug report, questions and discussion are welcome, you can post an issue or pull a request.
All graphs are painted by yed, it is simple, cross-platform and free.
There are some key-point.md file, key points and difficult points are summarized in them.
As we know only teacher can buy the answer book, so I don't know the standard answer, but I tried my best to keep the correctness, if you found any bug, please tell me, thanks.

It is still under consideration. Anyone know which is suitable?