Number of 1 Bits LeetCode solution in C++

1
class Solution {
2
 public:
3
  int hammingWeight(uint32_t n) {
4
    int ans = 0;
5
    while (n != 0) {
6
      n = n & (n - 1);
7
      ans++;
8
    }
9
    return ans;
10
  }
11
};