LeetCode 191 Number of 1 Bits

LeetCode 191 Number of 1 Bits

 

https://en.wikipedia.org/wiki/Hamming_weight

int hammingWeight(uint32_t n) {
    int num=0;
    while(n!=0)
    {
        n&=(n-1);
        num++;
    }
    return num;
}