LeetCode 191 Number of 1 Bits
概述
https://leetcode.com/problems/number-of-1-bits/
解法
利用 n & (n - 1) 删除 n 中的最后一个 1：
class Solution {
public:
int hammingWeight(uint32_t n) {
int count = 0;
while (n != 0) {
n = n & (n - 1);
count ++;
}
return count;
}
};