时间：2022-01-25 10:10:00 | 栏目：C代码 | 点击：次
Write a function that takes an unsigned integer and returns the number of '1' bits it has (also known as the Hamming weight).
For example, the 32-bit integer '11' has binary representation 00000000000000000000000000001011, so the function should return 3.
很简单的一道位操作Bit Manipulation的题，最近新出的三道题都没有啥难度啊，这样会误导新人的，做了这三道得出个LeetCode没啥难度的结论，其实里面好题真的不少，难题也很多，经典题也多，反正就是赞赞赞，32个赞。
class Solution {
public:
int hammingWeight(uint32_t n) {
int res = 0;
for (int i = 0; i < 32; ++i) {
res += (n & 1);
n = n >> 1;
}
return res;
}
};