C++ 代码

class Solution {
public:
    int hammingWeight(uint32_t n) {
        short num=0;
        while(n)
        {
            if(n&1) num++;
            n>>=1;
        }
        return num;
    }
};

class Solution {
public:
    int hammingWeight(uint32_t n) {
        short num=0;
        while(n)
        {
            n&=n-1;
            num++;
        }
        return num;
    }
};