中国DOS联盟

@echo off&setlocal enabledelayedexpansion
for /f "tokens=*" %%a in (a.txt) do (
   set "str=%%a"
   set "str=!str:[=!"
   if not "%%a"=="!str!" echo.
   echo %%a
)
pause

@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (1.txt) do (
echo %%i|findstr "^\[.*\]$">nul&&echo.
for %%j in (%%i) do set str=!str! %%j
echo !str:~1!&set str=
)
pause>nul

@echo off
for /f "delims=:" %%a in ('findstr /n ".*\[..*\]" a.txt') do set .%%a=a
for /f "tokens=1* delims=:" %%a in ('findstr /n .* a.txt') do (
   if defined .%%a echo.
   for /f "tokens=*" %%i in ("%%b") do echo.%%i
)
pause