irresolute

@echo off&setlocal enabledelayedexpansion
set "str=abcdefghijklmnopqrstuvwxyz0123456789"
set "code=jpg txt bat exe wma mp3"
md test&cd test
for /l %%a in (1,1,20) do (
    for /l %%b in (1,1,9) do (
          set /a a=!random!%%36
          call,set "var=!var!%%str:~!a!,1%%"
     )
    set /a b=!random!%%5+1&call :lp
    set "var="
)
goto :eof
:lp
for /f "tokens=%b%" %%c in ("%code%") do echo.>!var!.%%c
复制代码

set /a b=!random!%%5+1&call :lp此句改成set /a b=!random!%%6+1&call :lp就能生成mp3类型的文件了