number-of-1-bits

gistfile1.cpp

https://leetcode.com/problems/number-of-1-bits/

class Solution {
public:
    int hammingWeight(uint32_t n) {
        int size = 32; //uint32
        int numOne = 1;
        int cnt = 0;
        
        for(int i=0; i<size ; ++i) {
            if(n>>i & numOne) cnt++;
        }
        
        return cnt;
    }
};