中国DOS联盟

@echo off

sed "/^  *$/d" a.txt|find /v ""

pause

Originally posted by amio at 2008-7-13 12:52:
貌似没什么作用

@echo off

sed "/^ *$/d" a.txt>b.txt

move /y b.txt a.txt

Originally posted by HAT at 2008-7-13 02:38 PM:

@echo off

sed "/^ *$/d" a.txt>b.txt

move /y b.txt a.txt

C:\Test>C:\ProgramMy\GnuWin32\sed --version
GNU sed version 4.1.5
Copyright (C) 2003 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE,
to the extent permitted by law.

@echo off

sed "s/^ *//g" a.txt>b.txt

move /y b.txt a.txt

@echo off

sed "s/^ *//g" a.txt|find /v "">b.txt

move /y b.txt a.txt