Number of 1 Bits

class Solution {
public:
    int hammingWeight(uint32_t n) {
        string aaa = toBinary(n);
        in count = 0;
        for(int i = 0; i < sizeof(aaa); i++)    {
            if(aaa[i] == "1")
                count++;
        }
        return count;
    }
    
    string toBinary(unsigned int val)    {
        string aaa = "";
        for(int i = 16; i >= 0; i--)    {
            if(val & (1 << i))
                aaa += "1";
            else
                aaa += "0";
        }
        return aaa;
    }

};