Number of 1 Bits

Number of 1 Bits

 Total Accepted: 9192 Total Submissions: 24556

Question  Solution 

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.

Credits:
Special thanks to @ts for adding this problem and creating all test cases.

class Solution {
public:
    int hammingWeight(uint32_t n) {
        int i,Count=0;
        for(i=0;i<32;i++,n=n>>1)
            if(n&0x0001)
            Count++;
        return Count;
    }
};

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