LeetCode No.231 Power of Two

Given an integer, write a function to determine if it is a power of two.

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题目链接：https://leetcode.com/problems/power-of-two/

题目大意：判断一个数是否为2的幂。

思路：位操作。

参考代码：

class Solution {public:    bool isPowerOfTwo(int n) {        if ( n == 0 )        return false ;        while ( n )        {            if ( n & 1 && ( n >> 1 ) != 0 )                return false ;            n >>= 1 ;        }        return true ;    }};