大学计算机基础大学计算机基础 (24).ppt
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1、Characters in the digital worldEncoding English charactersThe encoding of English characters usually uses ASCII(American Standard Code for Information Interchange)code.There are two types of ASCII codes:7-bit version and 8-bit version.The 7-bit version is commonly used internationally.The 7-bit vers
2、ion has 128 elements,including 34 control characters,10 Arabic numerals,52 uppercase and lowercase English letters,32 various punctuation marks and arithmetic symbols.In the computer,8 characters are used to represent a character,and the highest bit is 0.The table lists the ASCII codes of all 128 sy
3、mbols048A65a97Space32Expressed in hexadecimal,030HA41HEncoding Chinese characters All Chinese characters and symbols of the national standard form a 94 94 matrix.In this square matrix,each row is called a“zone”(zone code is 01-94),and each column is called a“bit”(bit number is 01-94),the square matr
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