c_cpp 주어진수가2의거듭제곱인지여부체크

Posted 2021-05-14

#include <iostream>
#include <cassert>

using namespace std;

bool powerOfTwo(int num)
{
    return !(num & (num - 1));
}

int main()
{
   assert(powerOfTwo(2) == true);
   assert(powerOfTwo(3) == false);
   
   return 0;
}