LeetCode231——Power of Two

Given an integer, write a function to determine if it is a power of two.

Credits:

Special thanks to @jianchao.li.fighter for adding this problem and creating all test cases.

实现：

    bool isPowerOfTwo(int n) {
        if (n == 0) return false;
        while ((n & 0x1) != 0x1) {
            n >>= 1;
        }
        return n == (n&0x1);
    }