中国DOS联盟

@echo off

for /f "tokens=2 delims=:" %%a in ('find /c /v "" "abc.txt"') do set /a n=%random%%%%%a+1"

findstr /n .* abc.txt|findstr /b "%n%:"

pause>nul

@echo off

for /f %%a in (abc.txt) do set /a n+=1

set /a line=%random%%%%n%

for /f "delims=" %%b in ('more +%line% abc.txt') do echo %%b & goto out

:out

pause