Question

Write a short C++ function, isTwoPower, that takes an int i and returns true if and only if i is a power of 2. Do not use multiplication or division,

Answer 1

`Hey,

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#include<iostream>
using namespace std;
bool isTwoPower(int i)
{
// use of bitwise AND (&) operator
       if((i&(i-1))==0)
           return true;
       else
           return false;
}
int main()
{
   // declaring the array n
   int i;
   cout<<"Enter integer: ";
   cin>>i;
   if(isTwoPower(i))
   cout<<"True";
   else
   cout<<"False";
  
   return 0;  
}

main.cpp 1 #include<iostream> 2 using namespace std; 3 bool isTwoPower(int i) 4- { 5 // use of bitwise AND (&) operator 6 if((i&(i-1))==0) 7 return true; 8 else 9 return false; 10 } 11 int main() 12. { 13 // declaring the array n 14 int i; 15 cout<<"Enter integer: "; 16 cin>>i; 17 if(isTwoPower(i)) 18 cout<<"True"; 19 else 20 cout<<"False"; 21 22 return 0; 22_2 K input Enter integer: 1024 True ... Program finished with exit code o Prof ENTER to it console

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Thanks.