How to use unsigned types for bit manipulation in C++

Today, I will talk to you about how to use unsigned types for bit operations in C++. Many people may not know much about it. In order to let everyone know more, Xiaobian summarizes the following contents for everyone. I hope you can gain something according to this article.

Reason

Unsigned types support bit manipulation without surprises from sign bits.

The unsigned type supports bit operations that are not disturbed by sign bits.

Example

unsigned char x = 0b1010'1010;

unsigned char y = ~x; // y == 0b0101'0101;

Note:

Unsigned types can also be useful for modulo arithmetic. However, if you want modulo arithmetic add comments as necessary noting the reliance on wraparound behavior, as such code can be surprising for many programmers.

Unsigned types are also useful for modulo operations. However, if you want to use modulo operations, add the necessary comments to indicate that the results depend on wrapping behavior, because such code can confuse many programmers.

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