191. Number of 1 Bits - cocoder39/coco39_LC GitHub Wiki

191. Number of 1 Bits

int hammingWeight(uint32_t n) {
        int res = 0;
        for (int i = 0; i < 32; i++) {
            res += (n & 1);
            n >>= 1;
        }
        return res;
    }