342. Power of Four

最新推荐文章于 2024-06-04 11:17:38 发布

hebastast

最新推荐文章于 2024-06-04 11:17:38 发布

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分类专栏：数组

本文链接：https://blog.youkuaiyun.com/HE19930303/article/details/53535883

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本文介绍了一种使用对数方法来判断一个整数是否为4的幂次方的有效算法。通过计算输入整数以4为底的对数值并检查其是否为整数来实现这一目标。

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class Solution {
public:
    bool isPowerOfFour(int num) {
        float a=log(num)/log(4);
        if(a-int(a)==0)
            return true;
        else 
            return false;
    }
};

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