中国DOS联盟

Originally posted by 26933062 at 2008-5-24 02:37:

最后一行没有显示出来。

abcd不是最后一行？

看我的样本，最后一行是 “下正确”

报到

加个abcd是不是倒数第二行判断：

@echo off&setlocal enabledelayedexpansion

for /f "delims=" %%i in (b.txt) do (

    set str=%%i&set /a n+=1

    set _!n!=%%i

    if "!str:~,4!"=="abcd" call :lp 

)

set /a m=n-1

set str=!_%m%!

if "!str:~,4!"=="abcd" echo !_%n%!

pause>nul&goto :eof

:lp

if defined c echo !_%c%!

set b=%n%

set /a a=b-1,c=b+1

echo !_%a%!&echo !_%b%!

还要考虑 简洁和效率

发一个 这样处理行不
@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (a.txt) do (
set str=%%i
if "!str:~,4!"=="abcd" echo !var!&echo %%i
set var=%%i
)
pause
我也要分
@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (a.txt) do (
if defined str1 echo !str1!&echo !var!&echo %%i&set str1=
set str=%%i
if "!str:~,4!"=="abcd" set str1=!var!
set var=%%i
)
pause

Last edited by terse on 2008-5-24 at 10:33 AM ]

昨晚思路卡住了：

@echo off&setlocal enabledelayedexpansion

for /f "delims=" %%i in (b.txt) do (

    set /a n+=1

    set _!n!=%%i

    if !n! geq 3 call :lp

)

pause>nul&goto :eof

:lp

set c=%n%

set /a b=c-1,a=c-2

set str=!_%b%!

if "!str:~,4!"=="abcd" echo !_%a%!&echo !_%b%!&echo !_%c%!

Last edited by zw19750516 on 2008-5-24 at 11:18 AM ]

Originally posted by terse at 2008-5-24 10:20:
发一个 这样处理行不
@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (a.txt) do (
set str=%%i
if "!str:~,4!"=="abcd" echo !var!& ...

高。。。