中国DOS联盟

@echo off&setlocal enabledelayedexpansion

set var=abcdefghijklmnopqrstuvwxyz01234567890

for /l %%i in (0 1 35) do call:lp %%i

    set z=a

    for /f "delims=" %%i in (a.txt) do set str=%%i&set str2=&call:lp1

    pause&exit

:lp1

set str1=!str:~,1!

    if "!str1!"==" " set "str2=!str2! "

    set str2=!str2!!%str1%!&set str=!str:~1!

    if not defined str echo !str2!&goto :eof

    goto lp1

:lp

set/a n=%1+1

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