Which bit wise operator is suitable for turning off a particular bit in a number in C/C++?

Question

Something like :

IN(Range)

Answer 1

Use XOR(^) operator for switching ON/OFF a particular bit

Comments

But it may not tell if you have switched off or on. It will just toggle.

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Then this will work
(number | ~(0 | 2^(bitPosn)))

Answer 2

say you want to switch off 8th bit from right, use & operator in the following way.

num = num & (~(1<<7));

say you want to switch on 8th bit from right, use | operator in the following way.

num = num | ((1<<7));

Answer 3

Use bit-wise AND (&) to turn off a particular bit in a number.

int bit_off(int num, int pos)
{
 num = num & (~ (1 << pos));
 return num;
}

Comments

I think it should be num = num & (~ (1 << (pos-1)));

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Yeah, It depends on u r going to start value of pos from 0 or 1....I m considering 0 !!

Answer 4

why cant we try this..

(bit position) & 0 .

Comments

(num & 0) will always results to 0.

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but the question is for off only...

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yeah, check my answer...it is only for off a particular bit