How do you randomly zero a bit in an integer?

Question

Updated with newer answer and better test

Let\'s say I have the number 382 which is 101111110.

How could I randomly turn a bit which is not 0 to

Answer 1

int changeBit(int a)
{
    a = ~a;
    int temp = a;
    while(temp == a)
    {
        r = Math.pow(2,(int)(32*random.next()));
        a = a || r;    
    }

    return ~a;
}