/*************************************************************************

     > File Name: LeetCode342.c

     > Author: Juntaran

     > Mail: Jacinthmail@gmail.com

     > Created Time: 2016年05月10日 星期二 02时50分00秒

  ************************************************************************/

 /*************************************************************************

     Power of Four

     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?

  ************************************************************************/

 #include "stdio.h"

 int isPowerOfFour(int num) {

     double tmp = log10(num)/log10();

     return tmp == (int)tmp ?  : ;

 }

 int main()

 {

     int n = ;

     int ret = isPowerOfFour(n);

     printf("%d\n",ret);

     n = ;

     ret = isPowerOfFour(n);

     printf("%d\n",ret);

     return ;

 }