191.位移的个数

 

 

class Solution {
public:
	int hammingWeight(uint32_t n) {
		int bits = 0;
        uint32_t mask=1;
		for (int i = 0; i < 32; i++)
		{
			if ((n&mask) != 0)
				bits++;
			mask=mask<<1;
		}
		return bits;

				
	}
};