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@echo off setlocal enabledelayedexpansion (for /f "tokens=1-6 delims=:" %%a in ('type "mac.txt"') do ( set /a n=1%%f+1 echo %%a:%%b:%%c:%%d:%%e:!n:~-2! ))>"mac.txt.new" move /y "mac.txt.new" "mac.txt" > nul复制代码