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342. Power of Four(LeetCode)

时间:2017-05-15 12:03:36      阅读:153      评论:0      收藏:0      [点我收藏+]

标签:out   leetcode   tco   loop   return   bre   blog   whether   style   

Given an integer (signed 32 bits), write a function to check whether it is a power of 4.

Example:
Given num = 16, return true. Given num = 5, return false.

Follow up: Could you solve it without loops/recursion?

 1 class Solution {
 2 public:
 3     bool isPowerOfFour(int num) {
 4          if (num == 0)
 5             return false;
 6         while (num != 1)
 7         {
 8             if (num % 4 != 0)
 9                 break;
10             else
11             {
12                 num = num / 4;
13             }
14         }
15         if (num == 1)
16             return true;
17         else
18             return false;
19     }
20 };

 

342. Power of Four(LeetCode)

标签:out   leetcode   tco   loop   return   bre   blog   whether   style   

原文地址:http://www.cnblogs.com/wujufengyun/p/6855598.html

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