中国DOS联盟

RE bd123456789:

1. The effect of pause>nul is the same as the standalone pause command, except that it doesn't display the "Press any key to continue..." message. Here is the function of >nul. For a specific analysis, you can search for relevant discussion posts in the forum.

2. Refer to the following two links:
Detailed Explanation of Variable Delay (Recommended for Newcomers)
http://www.cn-dos.net/forum/viewthread.php?tid=28273&fpage=1

Under what circumstances should variable delay be used?
http://www.cn-dos.net/forum/viewthread.php?tid=20733&fpage=1

Hehe, practical
Thank you very much!

This thing is great. Already bookmarked. Thanks, LZ.

It's of great help to newbies~

The LZ is really a good guiding teacher. Write more... (Don't beat me... Hehe)

Got it. Thanks lxmxn!!!

It can also be passed like this!!!

Please allow me to raise a very basic question.
Moderator, after reading many of your posts, I can only say two words: "Admiration".

I have just started to get in touch with this kind of thing and there are many things I don't understand. For example, I just demonstrated the one you posted earlier, but I can't understand what it means. I hope you don't laugh at me.

I really hope to get everyone's help in future studies.

Thank you

Originally posted by fengjian at 2007-10-31 18:06:
Please allow me to post a very basic question
Moderator, after reading many of your posts, I just have two words in my heart: "Admiration"

I have just started to get in touch with this kind of thing, and there are many things I don't understand. For example, the one you just posted, I perform...

In fact, this variable interception is equivalent to the substr function in other languages, which can intercept a substring at a specified position in a string.

For example, if the first two characters of a string are what you want, then you can use variable interception to get the string you want.

For example
set string=cn.sina.com
set new=%string:~0,2%
Then the value of %new% is the first two characters of %string%, that is, "cn".

In a `for /l` loop in Windows batch scripting, the syntax `(start, step, end)` is used. For `(1,3,15)`: the `start` is 1, the `step` is 3, and the `end` is 15. It will iterate starting at 1, then add 3 each time, and stop when it reaches or exceeds 15. So it will generate values like 1, 4, 7, 10, 13, 16 (but 16 is over 15 so stops at 13). For `(1,4,15)`: the `start` is 1, the `step` is 4, and the `end` is 15. It will iterate starting at 1, then add 4 each time, and stop when it reaches or exceeds 15. So it will generate values like 1, 5, 9, 13, 17 (but 17 is over 15 so stops at 13). The first loop variable `%%a` takes on these values generated by the first `for /l` loop, and the second loop variable `%%b` takes on the values generated by the second `for /l` loop, and then each time it calls the `:printf` subroutine with `%%a` and `%%b` as arguments.

Continuing from the previous part, it seems that the FOR below doesn't use the value of this variable? I don't understand it.

RE z310394543:

1、(1,3,15) is used to control the variable %%i in the for loop, representing an arithmetic sequence, that is, a sequence starting from 1, increasing by a step of 3, but the maximum number is 15.

2、The variable var is used in the call sub - procedure, you can search for examples of call usage in the forum.

The efficiency of the moderator is really high

It simply didn't explain the usage. Those who know still know, and those who don't still don't.