# include <iostream>
# include <cmath>

using namespace std;

int main ( )
//
//  CIRCLE.CPP reads a point (X,Y) from the user,
//  and determines whether it is inside the unit circle.
//
//  The square root function sqrt() comes from <cmath>.
//
{
  float x, y;

  cout << "Enter (x,y): ";
  cin >> x >> y;

  if ( sqrt ( x * x + y * y ) <= 1.0 )
  {
    cout << "(" << x << "," << y 
         << ") is in the unit circle.\n";
  }
  else
  {
    cout << "(" << x << "," << y 
         << ") is NOT in the unit circle!\n";
  }

  return 0;
}