Modulo 2 is a binary algorithm, the core ofCRC calibration technology, so before we analyze the CRC algorithm, we must grasp the rules of modulo 2 operation. In the same way as arithmetic, modulo 2 also includes modulo 2 plus, modulo 2 minus, modulo
1. What is modulo 2 operation?
First of all, what is modulo 2? Modulo: The remainder, then, modulo 2, is divided by 2 to obtain the remainder.
Again, what is arithmetic? is subtraction.
That is, the modulo 2 operation, can be opened up in this way:
Key words: CRC algorithm principle; CRC verification; modulo 2 (mod 2); mod 2The CRC verification algorithm adopts a binary algorithm called "modulo 2 operation. The modulo 2 operation is the core part of the CRC operation. Therefore, before
Modulo 2 is a binary algorithm, the core of CRC calibration technology, so before we analyze the CRC algorithm, we must grasp the rules of modulo 2 operation. In the same way as arithmetic, modulo 2 also includes modulo 2 plus, modulo 2 minus,
Summary: We know that in different languages, the results of negative number modulo operations may be different. For example, (-11) % 5 calculates 4 in Python and-1 in C (c99. Truncate division floor division in most programming languages, if the
A very interesting phenomenon has been found today.As a division, Python2 and C + + have different divisible results in the case of negative numbers:When I was 5/3,Results for C + +: 1Results for Python2:2(Note that 5/-3 is still available in C + +-1
Whether it is good to take the model or not, it frees the majority of oier from the abyss of high precision.
However, the modulo operation is not always so convenient.
For example, division is inevitable in our operations.
Most of the time, the
This article is reproduced in: http://blog.sina.com.cn/s/blog_6f5c63ff0100tucb.html
We know that in different languages, the results of negative number modulo operations may be different. For example, (-11) % 5 calculates 4 in Python, whileThe
In many cases, modulo operations are used. Here we describe some pattern operations and prove them. The practical application of these theories will be recorded and explained in the future.
1. The modulo operation is a remainder operation (recorded
Beijing 2008Time limit:1000/1000 MS (java/others) Memory limit:32768/65535 K (java/others)Total submission (s): 741 Accepted Submission (s): 291Problem Descriptionas We all know, the next Olympic games would be held in Beijing in 2008. So the year
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.