标题: 我想倒着取行，怎么不行啊？取不到内容~ [打印本页]
作者: andred0421 时间: 2007-11-16 09:44 标题: 我想倒着取行，怎么不行啊？取不到内容~
想判断一下行的内容，不符合的取下一行（倒着）。现在每次取到的都是haha,
代码:
| Quote: | |
|
no.txt内容（是a.txt的行数）
| Quote: | |
|
a.txt内容
| Quote: | |
|
[ Last edited by andred0421 on 2007-11-16 at 09:49 AM ]
作者: lxmxn 时间: 2007-11-16 11:29
@echo off&Setlocal
set /p no=<no.txt
:loop
set /a no-=1
if %no% gtr 0 (call :getline %no%)
if "%string:~0,2%" == "20" (echo %string%) else (goto :loop)
endlocal
pause&exit/b
:getline
set string=
for /f "skip=%1 delims=" %%a in (a.txt) do (
set string=%%a&&goto :eof)
set /p no=<no.txt
:loop
set /a no-=1
if %no% gtr 0 (call :getline %no%)
if "%string:~0,2%" == "20" (echo %string%) else (goto :loop)
endlocal
pause&exit/b
:getline
set string=
for /f "skip=%1 delims=" %%a in (a.txt) do (
set string=%%a&&goto :eof)
作者: 26933062 时间: 2007-11-17 02:59
::
@echo off
set /p no=<no.txt
for /f "tokens=1* delims=:" %%a in ('findstr /n .* a.txt') do (
set var%%a=%%b
if %%a equ %no% goto loop
)
:loop
call set num=%%var%no%%%
if "%num:~0,2%"=="20" (echo %num%) else set /a no-=1&goto loop
pause
set /p no=<no.txt
for /f "tokens=1* delims=:" %%a in ('findstr /n .* a.txt') do (
set var%%a=%%b
if %%a equ %no% goto loop
)
:loop
call set num=%%var%no%%%
if "%num:~0,2%"=="20" (echo %num%) else set /a no-=1&goto loop
pause
作者: zerocq 时间: 2007-11-17 10:45
tac.exe 倒序读取文件