Access individual bits in a char c++

问题

How would i go about accessing the individual bits inside a c++ type, char or any c++ other type for example.

回答1:

If you want access bit N:

Get: (INPUT >> N) & 1;

Set: INPUT |= 1 << N;

Unset: INPUT &= ~(1 << N);

Toggle: INPUT ^= 1 << N;

回答2:

You would use the binary operators | (or), & (and) and ^ (xor) to set them. To set the third bit of variable a, you would type, for instance: 

a = a | 0x4

// c++ 14
a = a | 0b0100

Note that 4’s binary representation is 0100

回答3:

That is very easy Lets say you need to access individual bits of an integer Create a mask like this int mask =1; now, anding your numberwith this mask gives the value set at the zeroth bit in order to access the bit set at ith position (indexes start from zero) , just and with (mask<

来源：https://stackoverflow.com/questions/9531214/access-individual-bits-in-a-char-c