terse

没测试 1000个变量的效率
添加8行 >
休息

@echo off&setlocal enabledelayedexpansion
set m=1000
for /f "delims=" %%i in (all.txt) do set /an+=1&set #!n!=%%i
for /f "delims=" %%i in ('dir /b /a-d *.txt ^| findstr /ivx "all\.txt"') do (
    (for /l %%a in (1 1 10) do (
        set /a n=!random!%%m+1
        for %%b in (!n!) do echo !#%%b!
    ))>>"%%i"
)
pause
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terse

回复 4# xxpinqz
谢谢提醒 8行确实 应该  ))>>"%%i"