6.2 设有定义语句:char a='\72';,则变量a含几个字符.-百度知道 1个回答 - 提问时间:2013年07

以下英语内容来自n1256。pdf（开放的最新的C99标准）6。4。4。4 Character constants。octal-escape-sequence:\ octal-digit\ octal-digit octal-digit\ octal-digit octal-digit octal-digit。The octal digits that follow the backslash in an octal escape sequence are taken to be part of the construction of a single character for an integer character constant or of a single wide character for a wide character constant。 The numerical value of the octal integer so formed specifies the value of the desired character or wide character 。Each octal or hexadecimal escape sequence is the longest sequence of characters that can constitute the escape sequence。大概意思是,\后面接1~3个八进制数字都构成八进制转义序列,编译时转义序列取最长的,即\后面三个八进制数字就取三个,如果第三个是字母就尝试两个,等等。