批量修改文件（照片）名稱（格式）

@echo off 
rem start
setlocal EnableDelayedExpansion
set a=1
for /f "delims=" %%i in ('dir /b *.jpg') do (
if not "%%~ni"=="%~n0" (if !a! LSS 10 (ren "%%i" "A_000!a!.jpg") else ren "%%i" "A_!a!.jpg"
set /a a+=1
)
)
pause