[Iska]

Код:

@echo off
setlocal enableextensions enabledelayedexpansion

for /l %%i in (1,1,999) do for %%j in ("rar" "jpg") do (
	set sFile=%%~i.%%~j
	<nul set /p sVar=!sFile!	
	if exist "!sFile!" (
		echo *
	) else (
		echo.
	)
)

endlocal
exit /b 0