@echo off &setlocal enabledelayedexpansion
set first=ABCDEFGHIJKLMNOPQRSTUVWXYZ
set n=1
set m=1
set c=A
:loop
set filename=幻灯片!m!.jpg
if exists !filename! (
ren !filename! !c!!n!.jpg
set /a m+=1
set /a n+=1
if !n! gtr 10 (
set /a n=1
call set c=%%first:~%n%,1%%
)
goto :loop
)
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