yhcfsr

@echo off

rem 设置要替换的行
set "spcLines=1,9,72,143,253"

rem 设置替换的内容
set "spcStr=aaa"

rem 设置替换起始位置
set "spcPos=4"

(for /f "delims=" %%a in ('findstr ".*" "1.txt"') do (
	set/a "n+=1"
	set "line=%%a"
	setlocal enabledelayedexpansion
	for %%i in (!spcLines!) do if %%i equ !n! set "line=!line:~,%spcPos%!!spcStr!"
	echo;!line!
	endlocal
))>out.txt
复制代码