c++ - How do you set, clear, and toggle a single bit? -

how set, clear, , toggle bit in c/c++?

setting bit

use bitwise or operator (|) set bit.

number |= 1 << x; 

that set bit x.

clearing bit

use bitwise , operator (&) clear bit.

number &= ~(1 << x); 

that clear bit x. must invert bit string bitwise not operator (~), , it.

toggling bit

the xor operator (^) can used toggle bit.

number ^= 1 << x; 

that toggle bit x.

checking bit

you didn't ask might add it.

to check bit, shift number x right, bitwise , it:

bit = (number >> x) & 1; 

that put value of bit x variable bit.

changing nth bit x

setting nth bit either 1 or 0 can achieved following:

number ^= (-x ^ number) & (1 << n); 

bit n set if x 1, , cleared if x 0.