C++ and,or,not,xor 关键字
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C++ and,or,not,xor keywords
提问by uray
Possible Duplicate:
The written versions of the logical operators.
可能的重复：
逻辑运算符的书面版本。
I notice that C++ define keyword and, or, not, xor, and_eq, or_eq, not_eqand xor_eqas an alternative to &&, ||, !, ^, &=, |=, !=and |=. and they're rarely used! What's wrong? Are they not portable?
我注意到，c + +定义关键字and，or，not，xor，and_eq，or_eq，not_eq和xor_eq作为替代&&，||，!，^，&=，|=，!=和|=。他们很少使用！怎么了？它们不便携吗？
采纳答案by Maciej Piechotka
They come from C AFAIR from times when it was not known what special symbols are on the keyboard. So to have portable language they were defined so anyone can use C even if (s)he used keyboard with no &, |or ^(etc.).
它们来自 C AFAIR，当时不知道键盘上有什么特殊符号。因此，为了拥有可移植的语言，它们被定义为任何人都可以使用 C，即使（她）使用没有&,|或^（等）的键盘。
Nowadays when QWERTY is a standard (with AZWERTY & co. as variations) it is no longer an issue.
如今，当 QWERTY 成为标准（以 AZWERTY & co. 作为变体）时，它不再是问题。
PS. And of course for obfuscation code competitions ;)
附注。当然还有混淆代码竞赛;)
