中国DOS联盟

@echo off

>a.txt type nul

for /l %%a in (1,1,50000) do (

  >>a.txt echo 中国DOS联盟批处理室测试数据%%a

)

@echo off &setlocal enabledelayedexpansion

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

set /a n+=1

if !n! equ 49991 (exit /b 0)

>>b.txt echo %%i

)

@echo off

more +49990 1.txt>2.txt

echo.>>1.txt

findstr /bevig:2.txt 1.txt>3.txt

pause

C:\>timeit -s 2#if.bat

Version Number: Windows NT 5.1 (Build 2600)
Exit Time: 10:35 pm, Friday, November 21 2008
Elapsed Time: 0:00:28.484
Process Time: 0:00:21.453

C:\>timeit -s 4#findstr.bat

Version Number: Windows NT 5.1 (Build 2600)
Exit Time: 10:36 pm, Friday, November 21 2008
Elapsed Time: 0:00:04.093
Process Time: 0:00:00.046

Originally posted by HAT at 2008-11-22 12:51 PM:
tireless 兄的代码为何不贴出来？

@ECHO OFF&SETLOCAL ENABLEDELAYEDEXPANSION

Set/A N=1

FOR /F "skip=49990" %%i IN (a.txt) DO (

	Set String!N!=%%i

	Set/A N+=1

)

Set/A N-=1

Set Command=FindStr /VC:!String%N%! a.txt

Set/A N-=1

FOR /L %%i IN (!N! -1 1) DO Set Command=!Command!^|FindStr /VC:!String%%i!

Cmd/C !Command!>output.txt

Output.txt

Del Output.txt