China DOS Union

A question about automatic renaming in a batch file?
Under the DOS mode of win2000svser, executing the a.bat batch command file should automatically rename the original file "temp.txt" to current date + temp.txt (that is, a file named: "2005-03-04temp.txt". Note that the current date should be the system's automatic date for that day. I'm asking how to write the batch commands in a.bat. Thanks in advance to all the experts for your guidance!
The statement below works in win2000, but unfortunately it doesn't work under server, because %date% returns "Friday 2005-03-04", and because of the space it says it's invalid, boo.... how can I extract it and solve this, urgent urgent urgent.....
echo ren test.txt %date%test.txt >temp.bat

Many, many thanks to comrade chenhui530, thanks

It's nothing, actually the for command in systems above 2k is already very powerful

ren temp.txt %date%temp.txt seems to work already, is it necessary to use for?

The following is quoted from Climbing's post at 2005-3-7 2:56:54:
ren temp.txt %date%temp.txt
This command seems to work already, is it necessary to use for?

Because it is invalid in WIN2000SERVER, FOR is needed

Brother Climbing: ren temp.txt %date%temp.txt looks like it has no syntax errors, but under Win2000 the value of %date% includes both the date and the weekday, and there is a space between the date and the weekday, so the command becomes ren temp.txt 2005-03-07 星期一temp.txt. Because of that extra space, it reports incorrect syntax. The correct way is to put ren's second parameter in double quotes, that is, ren temp.txt "%date%temp.txt". Unfortunately, the result of this command includes the “weekday”, which does not match the OP's requirement. I originally thought of using Strings to solve it. But in Win2000, the Strings command cannot store the output string into a variable. chenhui uses the for command so brilliantly! Awesome!!

I tested the %date% variable using Windows 2003. I thought there should be no difference between 2003 and 2000, but I didn't expect there really is a difference (Microsoft systems are always this incompatible). The contents of my %date% variable under 2000 are:
C:\>echo %date%
Wednesday 2005-03-09 For this situation, you can write it like this: ren temp.txt %date:~-10%temp.txt If the weekday is at the end, you can write it as: ren temp.txt %date:~0,10%temp.txt Of course, chenhui's for command really is used very well and is also worth recommending. Strings really can't directly set variables under the NT environment, but it can be done with lmod.
strings right %date%, 10 | lmod /L1 set thedate= > temp.bat
call temp.bat
del temp.batOr without strings, use lmod directly:
date /t | lmod /L1 set thedate= > temp.bat
chcp 936
call temp.bat
del temp.bat

So "%date:~0,10%" can be used like that! That even saves Strings and Lmod. Haha, I learned another trick.