@echo off
setlocal ENABLEDELAYEDEXPANSION
:ip
set /p ip=input:&cls
echo !ip!|findstr "^[0-9]*$">nul||goto ip 
set /a ip-=1&if not !ip!==0 set "sk=skip=!ip! "
for /f "!sk!delims=" %%i in (aa.txt) do if "!tp!"=="" echo %%i>bb.txt&set tp=Y
pause>nul
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@echo off
set /p w=请输入要选择的行数:
set /a w=%w%-1
for /f "skip=%w%" %%b in (aa.txt) do (
setlocal enabledelayedexpansion
set /a q=!q!+1
if !q! gtr 1 goto b
echo %%b>f.txt
)
:b
pause>nul
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@if not defined debug @echo off

:loop
set /p "input=要输入的行数:"
echo %input%|findstr -RC:"^[0-9]*$" >nul 2>&1 || echo.输入行号错误请重新输入 && goto loop
for /f "tokens=2* delims=:" %%a in (
'findstr -N "." aa.txt ^| findstr -RC:"^%input%:"') do echo %%a>>bb.txt )
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 @echo off
for /f "tokens=1,2* delims=:" %%a in ('findstr /n . a.txt') do if %%a==3 echo %%b
pause
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 @echo off
setlocal enabledelayedexpansion
for /f "delims=" %%a in (a.txt) do (
set /a line+=1
if !line!==3 echo %%a
)
pause
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 @echo off
for /f "delims=" %%a in ('more a.txt +2') do echo %%a&goto end
:end
pause
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@echo off
for /f "skip=2 delims=" %%a in (a.txt) do echo %%a&goto end
:end
pause
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 @echo off
more a.txt +2>tmp.txt
set /p a=<tmp.txt
echo %a%
del /q tmp.txt
pause
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