中国DOS联盟

@echo off&setlocal enabledelayedexpansion

set var=abcdefghijk

set n=-1

:lp

set /a n+=1

call,set str=%%var:~%n%,1%%

if defined str (

   if "!n!" equ "!random:~2,1!" set "str= "

   set pus=!pus!!str!

   goto :lp

)

echo %pus%

pause

@echo off

set str=abcdefghijk

set /a a=%random%%%10

call,set var=%%str:~%a%,1%%

call,set str=%%str:%var%= %%

echo %str%

pause>nul

Originally posted by zw19750516 at 2008-5-6 05:52 PM:

@echo off

set str=abcdefghijk

set /a a=%random%%%10

call,set var=%%str:~%a%,1%%

call,set str=%%str:%var%= %%

echo %str%

pause>nul

[ Last edited by zw19750516 on 2008-5 ...

@echo off&setlocal enabledelayedexpansion

set str=aaaaaaaaaa

set n=0&set m=0&set x=0

:set 

set /a a=%random%%%10+1

for %%i in (%code%) do if %%i equ %a% goto set

set /a x+=1&set code=%code% %a%

if %x% lss 3 goto set

:lp

set /a n+=1

for %%i in (%code%) do if %%i equ %n% set m=1

if %m% equ 0 (

   set var=!var!%str:~,1%

   ) else (

   set "var=!var! "

) 

set str=%str:~1%&set m=0

if defined str goto lp

echo !var!

pause>nul