@echo off & setlocal enabledelayedexpansion
set "foldername=a"
set "xname=png jpg"
set /a num=10000
rem foldername设置文件夹名称
pushd "!foldername!" || goto :eof
for %%a in (%xname%) do (
for /f "tokens=* delims=" %%i in ('dir /s /b /a-d *.%%a') do (
set /a num+=1
ren "%%i" "!num!.%%a"
echo %%~nxi
)>>"%~dp0bat.log"
)
pause