检查位 [英] checking bits

问题描述

假设我有一个字符，我想检查第3位是0还是1 ......

我该怎么做？


谢谢！

lets say i have a char, and i want to check if the 3rd bit is 0 or 1...
how might i do this?

thanks!

推荐答案

" Mark" < MN ******* @ gmail.com>在消息中写道

news：11 ********************** @ g43g2000cwa.googlegr oups.com ...

"Mark" <mn*******@gmail.com> wrote in message
news:11**********************@g43g2000cwa.googlegr oups.com...

让我说我有一个字符，我想检查第3位是0还是1 ......
我该怎么做？

lets say i have a char, and i want to check if the 3rd bit is 0 or 1...
how might i do this?

了解按位运算符，

例如| ，&等等


你也应该使用无符号字符。


-Mike

Learn about the bitwise operators,
e.g. | , & , etc.

Also you should used unsigned characters for this.

-Mike

" Mike Wahler" < MK ****** @ mkwahler.net>在消息中写道

news：4e ***************** @ newsread1.news.pas.earthl ink.net ...

"Mike Wahler" <mk******@mkwahler.net> wrote in message
news:4e*****************@newsread1.news.pas.earthl ink.net...

标记 < MN ******* @ gmail.com>在消息中写道
新闻：11 ********************** @ g43g2000cwa.googlegr oups.com ...

"Mark" <mn*******@gmail.com> wrote in message
news:11**********************@g43g2000cwa.googlegr oups.com...

假设我有一个字符，我想检查第3位是0还是1 ......
我该怎么做？

lets say i have a char, and i want to check if the 3rd bit is 0 or 1...
how might i do this?

了解按位运算符，
例如| ，&等等

你也应该使用无符号字符。

Learn about the bitwise operators,
e.g. | , & , etc.

Also you should used unsigned characters for this.

另外，还有''std :: bitset' '从标准库中输入

。

-Mike

Alternatively, there''s the ''std::bitset'' type
from the standard library.

-Mike

好的。谢谢:)


这应该可以帮助其他任何关心的人。
http://www.cprogramming.com/tutorial...operators.html

alright. thanks :)

this should help anyone else who cares to know
http://www.cprogramming.com/tutorial...operators.html

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