Bit Operation #4

Let's think about how we can count the bit set to 1 in an integer?

 

int bitCount(unsigned int a)
{
    int count = 0;
    while (a != 0)
    {
        count += a & 0x01;
        a >>= 1;
    }
    return count;
}

Then, how can we optimize the process to work with several integers?