using System;

public class Program

    {

        static void Main(string[] args)

        {

            QuadraticEq q = new QuadraticEq(2, 4, 2);

            Console.WriteLine("d = {0}", q.Discriminant);

            double[] results = q.GetRealRoots();

            foreach (double x in results)

                Console.WriteLine(x);

            Console.WriteLine("Equation is {0}", q);

​

        }

    }

    public class QuadraticEq

    {

        int a = 0, b = 0, c = 0;

        double disc, x1, x2;

​

        public QuadraticEq(int a, int b, int c)

        {

            this.a = a;

            this.b = b;

            this.c = c;

            disc = b * b - 4 * a * c;

        }

        public double Discriminant

        {

            get { return disc; }

        }

        public double[] GetRealRoots()

        {

​

            double[] arr = { };

            if (disc == 0)

            {

                x1 = -b / (2.0 * a);

                double[] arr1 = { x1 };

                return arr1;

            }

            else if (disc > 0)

            {

                x1 = (-b + Math.Sqrt(disc)) / (2 * a);

                x2 = (-b - Math.Sqrt(disc)) / (2 * a);

                double[] arr1 = { x1, x2 };

                return arr1;

            }

            else return arr;

        }

        public override string ToString()

        {

            return a + "x^2+" + b + "x+" + c;

        }

​

    }