@echo off & setlocal ENABLEDELAYEDEXPANSION 
set str=123456789
set n=0
set sun=0
:loop
set /a sum=!str:~%n%,1!+%sum%
set /a n=%n%+1
if not !str:~%n%!== goto loop
echo %sum%
pause
nclick="copycode($('code0'));">復制代碼