语法分析
........\2.cpp
........\2.dsp
........\2.dsw
........\2.ncb
........\2.opt
........\2.plg
........\Debug
........\.....\2.exe
........\.....\2.ilk
........\.....\2.obj
........\.....\2.pch
........\.....\2.pdb
........\.....\test1.txt
........\.....\test2.txt
........\.....\vc60.idb
........\.....\vc60.pdb
........\test1.txt
........\test2.txt
........\xj.txt
........\产生式.txt
........\新建 文本文档.txt
........\稿.txt
........\非终结符.txt