[文本处理] 将文本内的行变成列的问题

@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%a in (a.txt) do (
  set /a n+=1
  set /p=%%a	<nul>>b.txt
  if "!n!"=="4" (
    set n=0
    echo.>>b.txt
  )
)
start notepad b.txt
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@echo off
setlocal enabledelayedexpansion
cd.>b.txt
set n=0
for /f "delims=" %%a in (a.txt) do (
    set "str=%%a"
    set str=!str: =!
    if defined str (
       set /a n+=1
       set /p=%%a        <nul>>b.txt
       if "!n!"=="4" (
         set n=0
         echo.>>b.txt
       )
    )
)
pause
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@echo off
setlocal EnableDelayedExpansion
cd.>b.xls
for /f "delims=" %%i in (b.txt) do (
  set "str=%%i"
  set "str=!str:  = !"
  set "str=!str: ={TAB} !"
  echo !str!
  echo !str!>>b.xls
)
pause
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@echo off&setlocal enabledelayedexpansion
for /f "tokens=*" %%i in (a.txt) do (
    if not "%%i"=="" (
    set "str=%%i"
    set/a n+=1,m=n%%4
    if !m! equ 0 (>>b.xls echo !var!{TAB}%%i&set var=)else (
    if !m! equ 1 (set "var=%%i")else set "var=!var!{TAB}%%i"
)))
pause
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