@echo off
set info=互助互利,支付宝扫码头像,感谢打赏
rem 有问题,可加QQ956535081及时沟通
title %info%
cd /d "%~dp0"
set "input=a.txt"
set output=b.txt
(for /f %%a in ('type "%input%"') do (
    set /a s+=%%a
    setlocal enabledelayedexpansion
    echo;!s!
    endlocal
))>"%output%"
:end
echo;%info%
pause
exit
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@echo off&&setlocal enabledelayedexpansion
set aa=0
for /f %%i in (a.txt) do (
   set /a ab=%%i+!aa!
   set "aa=%%i"
   echo !ab!>>b.txt
)
pause
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