中国DOS联盟

@echo off
for /f "delims=" %%a in (a.txt) do (
  echo.%%a
  if "%%a"=="第 3 行的内容" goto out
)
:out
pause

@echo off & setlocal EnableDelayedExpansion
for /f "delims=" %%a in (a.txt) do (
  echo.%%a
  set /a n+=1 & if !n!==3 goto out
)
:out
pause

@echo off
for /f "tokens=1,* delims=:" %%a in ('findstr /n .* a.txt') do (
  echo.%%b
  if %%a==3 goto out
)
:out
pause

@echo off
for /r %%i in (*.txt) do (

for /f "tokens=1,* delims=:" %%a in ('findstr /n .* %%~si') do (
  echo.%%b
  if %%a==3 goto out
)

:out
pause
)

@echo off
for %%i in (*.txt) do CALL :3 "%%i"

PAUSE & EXIT /B

:3
for /f "tokens=1,* delims=:" %%a in ('findstr /n .* %~s1') do (
  echo.%%b
  if %%a==3 goto :EOF
)

@echo off
for %%i in (*.txt) do CALL :3 "%%i"
exit/b

:3
echo.%1
for /f "tokens=1,* delims=:" %%a in ('findstr /n .* %~s1') do (
  echo.%%b
  if %%a==10 (
     pause
     goto :EOF
  )
)