@echo off&setlocal enabledelayedexpansion
:: 首先生成一个100行的示例文本1.txt：
if exist 1.txt del /q /f 1.txt
for /l %%i in (1,1,100) do echo [%%i] bat-zw19750516>>1.txt
start 1.txt
:: 然后随机取其中的四行内容：
for /f "delims=" %%i in (1.txt) do set /a n+=1&set _!n!=%%i
:lp
set /a a=%random%%%100+1
for %%i in (%num%) do if "%%i" equ "%a%" goto lp
set num=%num% %a%
if "%num:~9%" equ "" goto lp
for %%i in (%num%) do echo.&echo 随机取出的第%%i行：!_%%i!
pause>nul&taskkill /im notepad.exe /f
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