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