Home Database Mysql Tutorial ASCII 码的规律技巧

ASCII 码的规律技巧

Jun 07, 2016 pm 03:24 PM
ascii letter Skill number law memory

字母和数字的 ASCII 码的记忆是非常简单的。 一,首先要观察一下ASCII 码的内在规律。 (1)此表的构造为16行8列。 (2)整张表可以分为两部分:靠近左侧的3列为不常用的,右侧4列为常用的。 (3)英文字母本身只有26个,因此需要在两列展示。 二,对于常用

 ASCII 码的规律技巧

     字母和数字的 ASCII 码的记忆是非常简单的。        

   一,首先要观察一下ASCII 码的内在规律。

(1)此表的构造为16行8列。

(2)整张表可以分为两部分:靠近左侧的3列为不常用的,右侧4列为常用的。

(3)英文字母本身只有26个,因此需要在两列展示。

     二,对于常用的部分,我们只要记住了几个字母或数字 的 ASCII 码:

(1)  

                 A 的 ASCII  码为  65

                 a 的 ASCII  码为  97

                 0 的 ASCII  码为  48

 

(2)或者,记忆                十六进制(H)

                            1     31

                            A     41

                            a     61

   以此类推

知道相应的大小 写字母之间差 32 ,就可以推算出其余字母、数字的 ASCII 码。

   三, 对于不常用的部分

我们只要简要的记住以下四个就可以了:

                                      二进制(B)   十六进制(H)   十进制(D) 

    CR   回车键                      0000,1101     0D              13

    LF   软回车键(用于word文档)    0000,1010     0A              10

    ESC  退出键                      0001,1011     1B              27

    SP   空格键                      0010,0000     20              32   

    虽然标准 ASCII 码是 7 位编码,但由于计算机基本处理单位为字节( 1byte = 8bit ),所以一般仍以一个字节来存放一个 ASCII 字符。每一个字节中多余出 来的一位(最高位)在计算机内部通常保持为 0

 

 

 

 

 

 

 

 

 

 

 

 

 

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
2 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Hello Kitty Island Adventure: How To Get Giant Seeds
1 months ago By 尊渡假赌尊渡假赌尊渡假赌
Two Point Museum: All Exhibits And Where To Find Them
1 months ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Win11 Tips Sharing: Skip Microsoft Account Login with One Trick Win11 Tips Sharing: Skip Microsoft Account Login with One Trick Mar 27, 2024 pm 02:57 PM

Win11 Tips Sharing: One trick to skip Microsoft account login Windows 11 is the latest operating system launched by Microsoft, with a new design style and many practical functions. However, for some users, having to log in to their Microsoft account every time they boot up the system can be a bit annoying. If you are one of them, you might as well try the following tips, which will allow you to skip logging in with a Microsoft account and enter the desktop interface directly. First, we need to create a local account in the system to log in instead of a Microsoft account. The advantage of doing this is

What are the tips for novices to create forms? What are the tips for novices to create forms? Mar 21, 2024 am 09:11 AM

We often create and edit tables in excel, but as a novice who has just come into contact with the software, how to use excel to create tables is not as easy as it is for us. Below, we will conduct some drills on some steps of table creation that novices, that is, beginners, need to master. We hope it will be helpful to those in need. A sample form for beginners is shown below: Let’s see how to complete it! 1. There are two methods to create a new excel document. You can right-click the mouse on a blank location on the [Desktop] - [New] - [xls] file. You can also [Start]-[All Programs]-[Microsoft Office]-[Microsoft Excel 20**] 2. Double-click our new ex

A must-have for veterans: Tips and precautions for * and & in C language A must-have for veterans: Tips and precautions for * and & in C language Apr 04, 2024 am 08:21 AM

In C language, it represents a pointer, which stores the address of other variables; & represents the address operator, which returns the memory address of a variable. Tips for using pointers include defining pointers, dereferencing pointers, and ensuring that pointers point to valid addresses; tips for using address operators & include obtaining variable addresses, and returning the address of the first element of the array when obtaining the address of an array element. A practical example demonstrating the use of pointer and address operators to reverse a string.

VSCode Getting Started Guide: A must-read for beginners to quickly master usage skills! VSCode Getting Started Guide: A must-read for beginners to quickly master usage skills! Mar 26, 2024 am 08:21 AM

VSCode (Visual Studio Code) is an open source code editor developed by Microsoft. It has powerful functions and rich plug-in support, making it one of the preferred tools for developers. This article will provide an introductory guide for beginners to help them quickly master the skills of using VSCode. In this article, we will introduce how to install VSCode, basic editing operations, shortcut keys, plug-in installation, etc., and provide readers with specific code examples. 1. Install VSCode first, we need

Quickly learn about ASCII value conversion in PHP Quickly learn about ASCII value conversion in PHP Mar 28, 2024 pm 06:42 PM

ASCII value conversion in PHP is a problem often encountered in programming. ASCII (American Standard Code for Information Interchange) is a standard encoding system for converting characters into numbers. In PHP, we often need to convert between characters and numbers through ASCII code. This article will introduce how to convert ASCII values ​​in PHP and give specific code examples. 1. Change the characters

PHP programming skills: How to jump to the web page within 3 seconds PHP programming skills: How to jump to the web page within 3 seconds Mar 24, 2024 am 09:18 AM

Title: PHP Programming Tips: How to Jump to a Web Page within 3 Seconds In web development, we often encounter situations where we need to automatically jump to another page within a certain period of time. This article will introduce how to use PHP to implement programming techniques to jump to a page within 3 seconds, and provide specific code examples. First of all, the basic principle of page jump is realized through the Location field in the HTTP response header. By setting this field, the browser can automatically jump to the specified page. Below is a simple example demonstrating how to use P

Win11 Tricks Revealed: How to Bypass Microsoft Account Login Win11 Tricks Revealed: How to Bypass Microsoft Account Login Mar 27, 2024 pm 07:57 PM

Win11 tricks revealed: How to bypass Microsoft account login Recently, Microsoft launched a new operating system Windows11, which has attracted widespread attention. Compared with previous versions, Windows 11 has made many new adjustments in terms of interface design and functional improvements, but it has also caused some controversy. The most eye-catching point is that it forces users to log in to the system with a Microsoft account. For some users, they may be more accustomed to logging in with a local account and are unwilling to bind their personal information to a Microsoft account.

Detailed explanation of the usage skills of √ symbol in word box Detailed explanation of the usage skills of √ symbol in word box Mar 25, 2024 pm 10:30 PM

Detailed explanation of the tips for using the √ symbol in the Word box. In daily work and study, we often need to use Word for document editing and typesetting. Among them, the √ symbol is a common symbol, which usually means "right". Using the √ symbol in the Word box can help us present information more clearly and improve the professionalism and beauty of the document. Next, we will introduce in detail the skills of using the √ symbol in the Word box, hoping to help everyone. 1. Insert the √ symbol In Word, there are many ways to insert the √ symbol. one

See all articles