China DOS Union

Hehe, ask a question, how to write %windir% into a.txt under the command line.

I originally thought c:\>echo %windir%>a.txt and then type a.txt to find out it's not the case, 55, what to do

You are also an old forum member, but your post is still so non-standard. This problem is very simple, but I don't plan to answer you for now. Unless you can understand the post in my signature.

Well, got it. Tell me then. I'm so anxious and won't dare next time I just finished the college entrance examination this year and am self-studying these things. I didn't find any specialized books on this in the bookstore, 55. I remember I asked another question in a post last time, and you explained the question I asked above, but I really didn't understand, so I posted again today, 555. Did something wrong

Actually, you only need to change the title of a post, for example, change it to: How to output the %windir% string to another batch file in batch processing? And you should note in the post which Windows environment you operated in. Suggest you now modify the top post of yours, and next time you post, there's no need for me to remind you like this, right? Since I don't know which Windows you operated in, I tested with Windows xp/2003 DOS, and the following command is usable, and Windows 2000 should also be okay: echo %windir^% > a.txt

Um, thanks, I've already changed it. I understand this. Do you still remember the question I asked last time? It was about having friends write a batch file comment. There was a part:
set drive=
set alldrive=c d e f g h i j k l m n o p q r s t u v w x y z
echo @echo off >drivechk.bat
echo @prompt %%%%%%comspec%%%%%% /f /c vol %%%%%%1: $b find "Vol" > nul >{t}.bat
%comspec% /e:2048 /c {t}.bat >>drivechk.bat
del {t}.bat
echo if errorlevel 1 goto enddc >>drivechk.bat Although you've already explained it to me, I still don't understand why there are so many %%%%%% like %%%%%%comspec%%%%%% /f /c vol %%%%%%1:

Regarding the problem of the previous HDKP.bat, a netizen has already answered it carefully last time. You should study it carefully. Without the spirit of research, you can't learn anything and may not be able to succeed.

echo %%%%comspec%%%%
Displays: %%%%comspec%%%%