231 Power of Two 2的幂

Posted 2020-10-30 lina2014

给定一个整数，写一个函数来判断它是否是2的幂。

详见：https://leetcode.com/problems/power-of-two/description/

class Solution {
public:
    bool isPowerOfTwo(int n) {
        return (n>0)&&(!(n&(n-1)));
    }
};