'\ 0' is not an ascii code value. It is a character and its ASCII value is 0.
‘\0‘==0
0 digit 48
The space ASCII code value is 32.
main() { char a=‘\0‘; if(a==0) printf("A ASCII is 0\n"); if(a==‘ ‘) printf("A is space\n"); printf("*%
ASCII, GB2312, GBK, UTF-8 encoding:
Original address: HTTP://HI.BAIDU.COM/PHPEASE/ITEM/F450B5CAEC143014505058FC
variable naming rules:
1. Variable names are case-sensitive (case-sensitive).
2. Must begin with a letter or underscore. Variable
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
Instance
Returns the ASCII value of "H":
"; Echo ord (" Hello ")." ";? >
Definition and usage
The Ord () function returns the ASCII value of the first character in a string.
Grammar
Ord (String)
Parameter description
string is required. The string
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
Complete 8-bit ASCII two-dimensional table
ASCII and American Standard Code for information interchange read as "astkey", which defines the English letters or the same result and meaning represented by the 127 numbers ranging from 0 to one hundred
Chr () and ASCII () functions in Oracle (attached: characters commonly used and ASCII table)keywords: chr ()Chr () function action: Special handling of "special" charactersThe corresponding loadline and special characters can be queried in PlsqlChr (
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
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
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
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