qixiaobin0715

@echo off
set /a m=1000,n=1001
setlocal enabledelayedexpansion
for /f "delims=" %%a in (a.txt) do set /a m+=2&set #!m!=%%a
for /f "delims=" %%b in (b.txt) do set /a n+=2&set #!n!=%%b
for /f "tokens=2 delims==" %%c in ('set #') do echo %%c
pause
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