目前计算机中用得最广泛的字符集及其编码,是由美国国家标准局(ANSI)制定的ASCII码(American Standard Code for Information Interchange,美国标准信息交换码),它已被国际标准化组织(ISO)定为国际标准,称为ISO 646标准。适用于所有拉丁文字字母,ASCII码有7位码和8位码两种形式。 因为1位二进制数可以表示(21=)2种状...
4、 BS 退一格 DC 3 设备控制3 RS 记录分隔符 HT 横向列表 DC4 设备控制4 US 单元分隔符 LF 换行 NAK 否定 DEL 删除 一 Text only 语言:Ascii 码表(全) ASCII Table (7-bit) (ASCII = American Standard Code for Information Interchange) 000 000 000 00000000 NUL (Null char.) 001 001 001 00000...
ACK承认DC1设备控制1FS文字分隔符 •下裁可编辑, BEL报警DC2设备控制2GS组分隔符 BS退一格DC3设备控制3RS记录分隔符 HT横向列表DC4设备控制4US单元分隔符 LF换行NAK否定DEL删除 Textonly语書:Ascii码表(全) ASCUTable(7-bit) (ASCII=AmericanStandardCodeforInformationInterchange) DecimalOctalHexBinaryValue ...
在ASCII码表中，按照ASCII码值从小到大的排列顺序是数字、英文大写字母、英文小写字母。大小规则：常见ASCII码的大小规则：0~9<A~Z<a~z。1、数字比字母要小。如 “7”<“F”；2、数字0比数字9要小，并按0到9顺序递增。如 “3”<“8” ；3、字母A比字母Z要小，并按A到Z顺序递增。如“A...
(ASCII = American Standard Code for Information Interchange) Decimal Octal Hex Binary Value --- --- --- --- --- 000 000 000 00000000 NUL (Null char.) 001 001 001 00000001 SOH (Start of Header) 002 002 002 00000010 STX (Start of Text) 003 003 003 00000011...
else return false; } 2、判断是否是GBK编码 bool isGBKCode(const string strIn) { ??? unsigned char ch1; ??? unsigned char ch2; ??? ???if (strIn.size() = 2) ??? { ???ch1 = (unsigned char)strIn.at(0); ??? ch2 = (unsigned char)strIn.at(1); ??? if (ch1=129 ch1=254...
(ASCII = American Standard Code for Information Interchange) Decimal Octal Hex Binary Value --- --- --- --- --- 000 000 000 00000000 NUL (Null char.) 001 001 001 00000001 SOH (Start of Header) 002 002 002 00000010 STX (Start of Text) 003 003 003 00000011 ETX (End of Text) 004...
ASCII(American Standard Code for Information Interchange,美国标准信息交换代码)是基于拉丁字母的一套电脑编码系统,主要用于显示 现代英语和其他西欧语言,其最多只能用 8 位(bit)来表示(一个字节(byte)),即:2**8 = 256,所以,ASCII码最多只能表示 256 个符号。
ASCII stands for "American Standard Code for Information Interchange", and roughly it is an agreed set of symbols, and the encoding for those symbols, that allows programmers and computers to communicate textual data. It was developed in the 1960s but has stuck around a long time since then....
Compared to using ranges they are going to be less bug-prone (no Off-by-one errors, etc) and more standard across codebases: ascii::LOWERCASE is [abcdefghijklmnopqrstuvwxyz] ascii::UPPERCASE is [ABCDEFGHIJKLMNOPQRSTUVWXYZ] ascii::DIGITS is [0123456789] ascii::HEXDIGITS is [0123456789abcdef...