@ECHO OFF
SET TxtDir="%~dp0"
echo.&set /p N=Please type in the end row No. (from 1 to this row, will be deleted!):

CD /D %TxtDir%
FOR /F "tokens=1 delims=" %%I IN ('DIR /A /B *.txt') DO ((MORE +%N% "%%I">"%%I_")&(DEL /A /F /Q "%%I")&(REN "%%I_" "%%I"))
PAUSE
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@echo off
cd /d "%~dp0"
set /a b=-2,d=-2
for %%i in (*.txt) do (
	setlocal
	call :1 "%%i"
	endlocal
)
pause & exit

	:1
	for /f "delims=" %%a in ('find /c /v "" ^<"%~1"') do (
		echo %%a
		set n=%%a
	)
	if %b% gtr 0 (
		if %d% gtr 0 (
			set /a s=b,e=b+d-1
		) else (
			set /a s=b+d+1,e=b
		)
	) else (
		if %d% gtr 0 (
			set /a s=n+b+1,e=s+d-1
		) else (
			set /a s=n+b+d+2,e=n+b+1
		)
	)
	echo 删除第 %s% - %e% 行
	(for /f "tokens=1* delims=[]" %%a in ('find /n /v "" ^<"%~1"') do (
		if %%a lss %s% (
			echo=%%b
		) else if %%a gtr %e% (
			echo=%%b
		)
	))>$
	move $ "%~1"
	exit /b
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sed -i -n -e :a -e "1,10!{P;N;D;};N;ba" *.txt
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sed -i "3,10d" *.txt
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@set @v=1 //&if "%~3" neq "" cscript /e:jscript "%~f0" "%~1" %2 %3 &exit/b
v = WSH.arguments, as = WSH.createobject('adodb.stream');
as.mode=3, as.type=2, as.charset='437', as.open, as.loadfromfile(v(0));
alllines = as.readtext().split('\r\n'), as.close;
nb = (v(1)<1)? 1: v(1), ne = (v(2)>=alllines.length)? alllines.length: v(2);
if (nb>ne) WSH.quit();
alllines = alllines.slice(nb-1,ne);
as.open, as.writetext(alllines.join('\r\n')), as.savetofile(v(0)+'.new',2), as.close;
WSH.quit();
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(for /f "delims=" %%a in ('find /n /v "" ^<"%~1"') do (
	set str=%%a
	setlocal enabledelayedexpansion
	if %%a lss %s% (
		echo=!str:*]=!
	) else if %%a gtr %e% (
		echo=!str:*]=!
	)
	endlocal
))>$
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@set @v=1 //&if "%~3" neq "" cscript /e:jscript "%~f0" "%~1" %2 %3 &exit/b
v = WSH.arguments, as = WSH.createobject('adodb.stream');
as.mode=3, as.type=2, as.charset='437', as.open, as.loadfromfile(v(0));
alllines = as.readtext().split('\r\n'), as.close;
nb = (v(1)<1)? 1: v(1), ne = (v(2)>=alllines.length)? alllines.length: v(2);
if (nb>ne) WSH.quit();
for (; alllines.slice(-1)==''; alllines.pop());
ab = alllines.slice(0, nb-1), ae = alllines.slice(ne), alllines = ab.concat(ae);
as.open, as.writetext(alllines.join('\r\n'));
as.savetofile(v(0)+'.new',2), as.close; WSH.quit();
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