C++ 单引号包含多个字符表示什么意思

C++ standard, §2.14.3/1 - Character literals

(...) An ordinary character literal that contains more than one c-char is a multicharacter literal . A multicharacter literal has type int and implementation-defined value.

 普通的字符包含多个字符就是多字符，一个多字符是一个int类型。

根据上面的输出

61  ->  'a'

62  ->  'b'

63  ->  'c'