当驱动器不存在时,这样为什么不能够跳转到 :error ?
set get=
get s "inupt drive letter please : "
dready %get% /W
IF NOT ERRORLEVEL 0 goto error
echo drive OK !
goto .............................
:error
echo drive not ready or read-only
-----------------------------------------------------------------------------
而要写成这样才可以,为什么?
set get=
get s "inupt drive letter please : "
dready %get% /W
IF ERRORLEVEL 1 goto error
IF ERRORLEVEL 2 goto error
IF ERRORLEVEL 255 goto error
echo drive OK !
goto .............................
:error
echo drive not ready or read-only