倒序显示文件内容\f1.txt
................\f2.txt
................\file.c
................\file.dsp
................\file.dsw
................\file.ncb
................\file.opt
................\file.plg
................\filecompile.c
................\out.txt
................\保持递增性.c
................\合并文件.c
倒序显示文件内容