[文本处理] [已解决]批处理为什么无法实现自增一/自加一？

@echo off
setlocal enabledelayedexpansion
set info=互助互利,支付宝扫码头像,感谢赞助
rem 有问题,可加QQ956535081及时沟通
title %info%
cd /d "%~dp0"
set n=1000
(for /f "delims=" %%a in ('type "A1.txt"') do (
    set /a n+=1
    echo;ren "RA1_!n:~-3!.jpg" "图片_%%a_3600x2400.jpg"
    ren "RA1_!n:~-3!.jpg" "图片_%%a_3600x2400.jpg"
))>"C1.txt"
echo;%info%
pause
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@echo off
set nm=1000
(for /f %%i in ('type "A1.txt"') do (
    set /a nm+=1
    call echo ren RA1_%%nm:~-3%%.jpg 图片_%%i_3600x2400.jpg
))>"C1.txt"
复制代码