public class Circle
    {
        private double radius;

        // constructor
        public Circle(int x, int y, double radius)
        {
            print_Surface(5);
        }

        public void print_Surface(double radius) {
            double surf = Math.PI * Math.Pow(radius, 2);
            Console.WriteLine("Surface of the Circle is {0} ", surf);
        }
        
}