China DOS Union

In Windows batch files, I want to create a file named with the current date, but there can't be "/" in the file name, so I need to remove the "/" in the current date; that is, I want to convert "2006/10/10" into "20061010" to generate a "20061010.txt" file. I only know that set d=%date% can get the current date, but how to remove the "/"? Which expert knows?

[ Last edited by stableboy on 2006-10-11 at 06:08 ]

Still not right,
%date:/=%
The output is %date:%=% Ah~!

%date:~0,4%%date:~5,2%%date:~8,2%

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\J>set a=2006/10/15

C:\Documents and Settings\J>echo %a:/=%
20061015

C:\Documents and Settings\J>_

==================================================

This is my operation situation

Thanks to both of you, your methods both work...

The technology here is so difficult, I read a few posts and don't understand...
I need to work hard and study DOS batch processing hard. ~! .~!

Today I discovered this new forum, it's a great forum, I will study here from now on,


to NaturalJ0:
I'm sorry, after adding points to the above, when I tried to add points to you, I found that I can only add 2 points every 24 hours, so I can only add points to you tomorrow~! :P

[ Last edited by stableboy on 2006-10-11 at 05:54 ]

In the 2000 system, it is correct to use %date:~4,4%%date:~9,2%%date:~12,2%

Experts, can you explain why?
:/ What is the function of this?
:~4,4 What is the function of this?

Originally posted by ARCF at 2006-10-11 06:07:
Dears, can you explain why?
What is the function of ":/"?
What is the function of ":~4,4"?

Here, ":/" should be understood in combination with "%date:/=%", and its function is to replace all the "/" characters in the "%date%" variable with the symbol after "=", and here there is nothing after "=", that is, replace it with an empty one, actually removing all "/" symbols in the value of the "%date%" variable.

And here ":~4,4" should also be understood in combination with the above "%date:~4,4%", that is, intercept the fourth character to the eighth character in the "%date%" variable, that is, start from the fourth position and count four characters backward.

It is recommended to read the "set /?" help command carefully....

Still, the code like %date:/=% is concise and practical.

```
For /F "tokens=1" %%a in ('date/t') do md %%a


The machine's time settings may vary.

Using for to analyze the output of date/t and then pass the date to md is better. I have been using it for 7 months.
I comprehensively utilized some system characteristics
Wrote a dynamic directory

[ Last edited by kcdsw on 2006-10-12 at 05:16 ]
```

The code of kcdsw, I tried it. In xpsp2, it can correctly create a directory with the current time.

Originally posted by kcdsw at 2006-10-12 05:14:
For /F "tokens=1" %%a in ('date/t') do md %%a

Machine time settings may vary

Use for to analyze the output of date/t and then pass the date to md, which is better...

Take advantage of system characteristics:
md %date%*
Adding * in front creates a directory for the current week.

The discussion is a bit off-topic.

Originally posted by 3742668 at 2006-10-12 06:36:

Using system characteristics:
md %date%*
Adding * in front means creating a directory for the current week.

The discussion is a bit off-topic.

Tried it according to the moderator's method, but it doesn't seem to work.

C:\>md %date%*
The syntax of the file name, directory name, or volume label is incorrect.
Error occurred while processing: Wednesday*.

Re lxmxn:
Well, you can add 2>nul at the end.
Don't be deceived by error messages. The key is whether there is a newly created directory in the current directory.