[其他] 【已解决】BAT：文件路径变量如何表述

@echo off
setlocal enabledelayedexpansion
for /l %%l in (100001,1,110000) do (
	set a=%%l
	(for /l %%k in (1000,1,1999) do (
		set b=%%k
		for /f "useback delims=" %%a in ("D:\!a:~-4!\!b:~-3!.txt") do (
			for %%b in (%%a) do (
				set /p=%%b <nul
			)
		)
		echo=
	))>>D:\!a:~-4!\!a:~-4!.txt
)
endlocal
pause
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