中国DOS联盟

@echo   off     
  choice   /c:dme   defrag,mem,end     
  if   errorlevel   3   goto   defrag     
  if   errorlevel   2   goto   mem     
  if   errotlevel   1   goto   end     
    
  :defrag     
  c:\dos\defrag     
  goto   end     
    
  :mem     
  mem     
  goto   end     
    
  :end     
  echo   good   bye 

@echo off
cls
set input=
:_loop
echo ======== Menu =======
echo         d. defrag
echo         m. mem
echo         e.  end
echo ===================
set /p input=Please make your choice(d/m/e): 

if /i [%input%]==[d] goto _defrag
if /i [%input%]==[m] goto _mem
if /i [%input%]==[e] goto _end
goto _loop

:_defrag
...
goto _end

:_mem
...
goto _end

:_end
...