剑指 Offer 15. 二进制中1的个数

二进制中1的个数

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

public class Solution {
    // you need to treat n as an unsigned value
    public int hammingWeight(int n){
        int res = 0;
        while(n != 0){
            n = n & (n - 1);
            res++;
        }
        return res;
    }
}

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