ascii

Analysis of ASCII and Unicode-encoded message writing files, asciiunicode Abstr:] ASCII and Unicode are two common character encodings. Their representation methods are different, so they must be differentiated in the program. Based on the actual development experience of the author, this article analyzes in detail the file Writing Process of ASCII and Unicode ch

Very detailed very good, turn around to study:Reprinted from: http://www.cnblogs.com/lidabo/archive/2013/11/27/3446518.html1, character encoding, internal code, incidentally introduced Chinese character codingCharacters must be encoded before they can be processed by the computer. The default encoding used by the computer is the internal code of the computer. Early computers used 7-bit ASCII encoding, and in order to deal with Chinese characters, prog

Label:For the use of ASCII and CHR functions, Oracle gives the following explanations:ASCII (x) Gets the ASCII value of the character X, CHR () and ASCII () with the opposite effect.That is: The ASCII function is used to convert the character to its corresponding ASCII code,

Features of 1.ASCIIASCII is an encoding specification used to denote English characters. Each ASCII character occupies 1 bytes, so the maximum number of characters that the ASCII encoding can represent is 255 (00H-FFH). This is not a problem for English, generally only use the first 128 (00H--7FH, the highest bit is 0). The top 1 of the other 128 characters (80H-FFH) are referred to as "extended

One, ASCII (STR1) Returns the ASCII code value of the leftmost character of the string str. If Str is an empty string, returns 0. If STR is NULL, return null Example:1. The code is as follows Copy Code Mysql> Select ASCII (' Hi ');+ ————-+| ASCII (' Hi ') |+ ————-+| 104 |+ ————-+1 row in

Beginners love to develop small games, such as snakes and Tetris. To develop such games, they must be controlled by keys. Generally, we use the getch () function to receive keys directly, then convert it to the corresponding ASCII code, and compare it with the ASCII code to determine what key the user is pressing, and then perform the corresponding operations based on the key, such as moving and rotating. H

Function name: Chartohex ()Function Description: Convert ASCII characters to 16 binaryFunction Description:Call Function:Global variables:Input: ASCII characterreturn: 16 binary/////////////////////////////////////////////////////////////////////unsigned char chartohex (unsigned char bhex) {if ((bhex>=0) (bhexBhex + = 0x30;else if ((bhex>=10) (bhexBhex + = 0x37;else Bhex = 0xFF;return bhex;}//////////////

In mysql, the ASCII function converts characters into ascii code values. the following small series will introduce the usage and examples of ASCII functions in mysql to coders. For more information about coders, see. ASCII (str1) Returns the ASCII code value of the leftmost

absrtact : When writing Python scripts, if we use Python to process Web page data or work with Chinese characters, this error message often occurs: syntaxerror:non-ascii character ' \ Xe6 ' in file./filename.py of Line 3, but no encoding declared. This article focuses on issues related to Unicode and Chinese, and special character encoding in Python. What rules should be followed for character encoding and decoding. Objective: If the password domain

languages cannot be stored in the same piece of ANSI-encoded text.The ANSI encoding represents an English character with a byte, representing Chinese with two bytes, and Unicode is represented by two bytes, whether it is an English character or Chinese. 2. ASCIIThe data inside the computer is eventually stored in binary form, with each bits (bit) having 0 and 12 states, and 8 bits (bit) combinations called a byte (byte), so a byte can be combined in 256 state, that is, from 00000000 to 11111111

We know that the Tomcat communication is based on the socket, and the socket on the server side and the client passes the message is not encoded byte stream, each 8 bits constitute 1 bytes, the computer is based on the binary system, which is due to the use of the transistor opening and closing state of 1 and 0, This allows 8 transistors to form a single byte, which is the smallest unit-byte used by the application layer.In the network communication through the socket program, if we do not know

American Standard Information Interchange Standard Code (American Standard Code for information interchange, ASCII) In a computer, all data is stored and computed in binary representation (because the computer is silly, only the binary values of the 0 and 1 digits are suitable for it). Similarly, 52 letters (including uppercase letters) such as A, B, C, and D, as well as numbers such as 0, 1, and 2, as well as some common symbols (such as *, #, @, et

Abstr:] ASCII and Unicode are two common character encodings. Their representation methods are different, so they must be differentiated in the program. Based on the actual development experience of the author, this article analyzes in detail the file Writing Process of ASCII and Unicode character encoding messages, which provides a useful reference for the development of relevant software. Key Words]

The so-called ASCII and 16 binary are just conceptual things that are all binary in the computerThe conversion should be the output of the conversion, the same number, in the computer memory is the same, but the output is not the sameASCII is the encoding of characters, almost the encoding of characters on the keyboard. The following is an ASCII and 16-binary table:

ASCII code table The ASCII code can be roughly divided into three parts.The first part is ASCII non-printable control characters;The second part is: ASCII printing characters;The third part is: Extended ASCII print characters.Part 1: ASC