题解 | #二进制中1的个数#
二进制中1的个数
http://www.nowcoder.com/practice/8ee967e43c2c4ec193b040ea7fbb10b8
c++新解法，用bitset容器轻松解决
class Solution {
public:
int NumberOf1(int n) {
bitset<32> a = n;
int num = 0;
for (int i = 0; i < 32; i++)
{
if (a[i] == 1) num++;
}
return num;
}
};