双向链表\a.txt
........\b.txt
........\Debug\Ex.exe
........\.....\Ex.obj
........\.....\Ex.pdb
........\.....\exam.obj
........\.....\vc60.pdb
........\Ex.cpp
........\Ex.dsp
........\Ex.dsw
........\Ex.h
........\Ex.ncb
........\Ex.opt
........\Ex.plg
........\Debug
双向链表