leetcode 326

3的幂

 1 class Solution {
 2 public:
 3     bool isPowerOfThree(int n) {
 4         double k;
 5         k=log10(n)/log10(3);
 6         if((int)k==k)
 7        return true;
 8        return false;
 9     }
10 };
原文地址:https://www.cnblogs.com/thefirstfeeling/p/5749455.html