Calculate square of a number without using *, / and pow()

#include<iostream>

using namespace std;

 

int square(int n)

{

   // handle negative input

   if (n<0) n = -n;

 

   // Initialize result

   int res = n;

 

   // Add n to res n-1 times

   for (int i=1; i<n; i++)

       res += n;

 

   return res;

}

 

// drive program

int main()

{

    for (int n = 1; n<=5; n++)

        cout << "n = " << n << ", n^2 = "

             << square(n) << endl;

    return 0;

}