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[Tutorial] Basic knowledge - [What is A code and U code]
U code basic knowledge U code introduction:
Unicode is a character encoding standard developed by the Unicode Association that can represent almost all written languages in the world.
Unicode character lists are represented in various forms, including UTF-8, UTF-16, and UTF-32. Most Windows interfaces use UTF-16. Unicode Transmission Format 8 (UTF-8) is a protocol character set developed based on ASCII code. The UTF-8 protocol provides extended support for ASCII codes, translation of UCS-2 codes, and international hexadecimal Unicode encoding character settings. UTF-8 allows for a wider range of names than using ASCII or extended ASCII encoding of character data.
Unicode Character System (UCS) An international standard character set reference that is part of the Unicode standard. The currently widely used version of the UCS standard is UCS-2, which specifies 16-bit character values that have been accepted and recognized as the encoding standard for most languages in the world.
U code Chineseization principle: In Unicode encoding, both English characters and Chinese characters occupy two bytes. Because the English Unicode "OK" is two characters occupying four bytes, and the Chinese "OK" is also two characters occupying four bytes, you can just replace it directly. Basic knowledge of A code Introduction to A code: Coding is the process of using words, symbols or numbers to represent specific objects (information). Computer coding uses binary coding.
ASCII=America Standard Code for Information Interchange, American Standard Code for Information Interchange, as a standard code for data transmission. It consists of 8 bits: 7 bits are used to represent English letters, numbers 0 to 9 and other symbols, usually plus a parity check. The ASCⅡ extended encoding method that uses 8 bits to represent 256 different text symbols. It has been confirmed as an international standard code.
ASCII=America Standard Code for Information Interchange, American Standard Code for Information Interchange, as a standard code for data transmission. In the early days, 7 bits were used to represent English letters, numbers 0 to 9, and other symbols. Now 8 bits are used, which can represent a total of 256 different words and symbols. It is the most common and widely used English standard code in various computer systems.
Encoding is a method of defining information according to the number of binary digits.
Principle of A code Chinese translation: A symbol and an English letter in ASCII encoding only occupy 1 byte, while a Chinese character still occupies 2 bytes. Therefore, compared with U code, it is more difficult for novices. Nowadays, more and more English software uses ASCII code, because ASCII code can make the software smaller and more convenient to develop. To put it bluntly, the U code in the hexadecimal character area starts with E. x. i. t situation emerged. The A code appears in the character area as Exit. Take E. x. i. t situation emerged. The A code appears in the character area as Exit.
