[文件操作] 如何删除历史文件，但是保留每天的最后一个文件？

@echo off
setlocal enabledelayedexpansion 
set latestTime="0"
for /f "tokens=1,2" %%a in ('dir myfile* /tc ^| find "myfile"') do (
	set createtime="%%a %%b"
	if /i !createtime! GTR !latestTime! (set latestTime=!createtime!)
	) 
for /f "tokens=1,2,4" %%a in ('dir myfile* /tc ^| find "myfile"') do (
	set createtime="%%a %%b"
	set fname=%%c
	if /i !createtime! NEQ !latestTime! del /f /q !fname!
	) 
pause
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