Given an integer, write a function to determine if it is a power of two.
1 class Solution { 2 public: 3 bool isPowerOfTwo(int n) { 4 if(n <= 0){ 5 return false; 6 } 7 8 return (n&(n-1)) == 0 ; 9 } 10 };
posted on 2016-09-12 10:26 三颗心 阅读(102) 评论(0) 编辑 收藏 举报