@echo off
set input=1.txt
set output=2.txt
for /f "tokens=1* delims=[]" %%a in ('find /n "@" ^<"%input%"') do (
	set _%%a=1
)
(for /f "tokens=1* delims=[]" %%a in ('find /n /v "" ^<"%input%"') do (
	if defined _%%a (
		echo *,,3000-0
	) else (
		echo=%%b
	)
))>"%output%"
pause
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@echo off
set "FileOld=1.txt"
set "FileNew=2.txt"
cd /d "%~dp0"
(for /f "delims=" %%i in ('type "%FileOld%"') do (
    set "StrOld=%%i"
    setlocal enabledelayedexpansion
    set "StrNew=!StrOld:@=!"
    if not "!StrNew!" == "!StrOld!" (
        echo,*,,3000-0
    ) else (
        echo,!StrOld!
    )
    endlocal
))>"%FileNew%"
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@echo off
set "FileOld=1.txt"
set "FileNew=2.txt"
cd /d "%~dp0"
(for /f "tokens=1* delims=:" %%a in ('findstr /n .* "%FileOld%"') do (
    set "StrOld=%%b"
    setlocal enabledelayedexpansion
    set "StrNew=!StrOld:@=!"
    if "!StrOld!" == "" (
        echo,
    ) else if not "!StrNew!" == "!StrOld!" (
        echo,*,,3000-0
    ) else (
        echo,!StrOld!
    )
    endlocal
))>"%FileNew%"
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sed "/@/c*,,3000-0" a.txt>b.txt
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@echo off &setlocal enabledelayedexpansion
(for /f "delims=" %%s in (a.txt) do (
	set "s=%%s" & if "!s:~-1!"=="@" (echo,*,,3000-0) else (echo,%%s)
))>b.txt
endlocal &exit/b
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sed -r "s/.*@.*/*,,3000-0/" 1.txt>2.txt
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@echo off
set "file=a.txt"
set "str=*,,3000-0"
(for /f "usebackq delims=" %%a in ("%file%") do (
     set "line=%%a"
      setlocal enabledelayedexpansion
      if "!line!" == "!line:@=!" (echo,!line!) else (echo,!str!)
      endlocal
))>b.txt
pause
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