601997526

楼主以后记得代码用code括起来

@echo off
setlocal enabledelayedexpansion
set "svar=abcdefABCDEF012345679
set "rvar="
set num=8
:loop
set /a num-=1
set /a rand=%random%%%21
set "rvar=%rvar%!svar:~%rand%,1!"
if not %num%==0 goto loop
echo !rvar!
pause>nul
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