字符合法性检查\data.txt
..............\Debug\data.txt
..............\.....\ttt.exe
..............\.....\ttt.ilk
..............\.....\ttt.obj
..............\.....\ttt.pch
..............\.....\ttt.pdb
..............\.....\vc60.idb
..............\.....\vc60.pdb
..............\ttt.cpp
..............\ttt.dsp
..............\ttt.dsw
..............\ttt.h
..............\ttt.ncb
..............\ttt.opt
..............\ttt.plg
..............\Debug
字符合法性检查