剑指offer---二进制中1的个数

Posted 2020-10-01 双马尾是老公的方向盘

class Solution {
public:
     int  NumberOf1(int n) 
     {
        int count = 0;
        unsigned int flag = 1;
        while (flag)
        {
            if (n & flag)
                count++;
            flag = flag << 1;
        }
        return count; 
     }
};