went

@echo off
setlocal enabledelayedexpansion
REM 循环所有pdf文件
for /f "delims=" %%i in ('dir /b *.pdf ^| sort') do (
	for /f "tokens=1,2 delims=#." %%a in ("%%i") do (
		set "curFileName=%%a"
		set "curVer=%%b"
		if "!curVer!"=="pdf" set "curVer=0"
	)
	if "!lastFileName!"=="" set "lastFile=%%i"&set "lastFileName=!curFileName!"&set "lastVer=!curVer!"
	if "!curFileName!"=="!lastFileName!" (
		REM 删掉ECHO
		if !curVer! lss !lastVer!  ECHO del "%%i"&set "curVer=!lastVer!"
		REM 删掉ECHO
		if !curVer! gtr !lastVer! ECHO del "!lastFile!"&set "lastFile=%%i"
		set "lastFileName=!curFileName!"&set "lastVer=!curVer!"
	) else ( 
		echo ---^> !lastFileName!最新版本:!lastVer!
		REM 删掉ECHO
		ECHO rename "!lastFileName!#!lastVer!.pdf" "!lastFileName!.pdf"
		set "lastFile=%%i"&set "lastFileName=!curFileName!"&set "lastVer=!curVer!"
		echo --------------------------------------------------
	)
)
echo ---^> !lastFileName!最新版本:!lastVer!
REM 删掉ECHO
ECHO rename "!lastFileName!#!lastVer!.pdf" "!lastFileName!.pdf"
echo --------------------------------------------------
pause
复制代码

确认无误删掉大写的ECHO