LeetCode：Number of 1 Bits

Problems:

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.

Solution:

 1 class Solution {
 2 public:
 3     int hammingWeight(unsigned int  n) {
 4
 5     int i=0;
 6     while(n>0)
 7     {
 9        int temp = n&0x1;
10        if(temp==1)
11        {
12         i++;
13        }
14        n=n>>1;
15     }
16     return i;
17
18     }
19 };