delegate void Function(float[] mas);
        class Test1
        {

            static void f1(float[] mas)//прямая
            {
                Random r = new Random();
                mas = new float[2];
                for (int i = 0; i < 2; i++)
                    mas[i] = (float)r.Next(10);

            }
            static void f2(float[] mas)
            {
                Random r = new Random();
                mas = new float[3];
                for (int i = 0; i < 2; i++)
                    mas[i] = (float)r.Next(10);
            }
            static void f3(float[] mas)
            {
                Random r = new Random();
                mas = new float[2];
                for (int i = 0; i < 2; i++)
                    mas[i] = (float)r.Next(10);
            }


        }

        delegate float Solution(float[] mas);
        class Test2
        {
            float a, b;


            public float A
            {
                set { a = value; }
                get
                {
                    return a;
                }
            }
            public float B
            {
                set { b = value; }
                get
                {
                    return b;
                }
            }
            public static float zhaz(float[] mas, float y)
            {
                float x = 0, p = 1;
                for (int i = 0; i < mas.Length; i++)
                {
                    x += mas[i] * p;
                    p *= y;
                }
                return x;
            }

            static float f1(float[] mas)
            {
                float a = 1, b = 2;
                while (Math.Abs(a + b) > 0.001)
                {
                    if (zhaz(mas, (b + a) / 2) > 0)
                        b = zhaz(mas, (b + a) / 2);
                    else
                        a = zhaz(mas, (b + a) / 2);
                }
                return a;
            }
            static float f2(float[] mas) { return 0; }
            static float f3(float[] mas) { return 0; }
        }

        static void Main(string[] args)
        {
            Function f;
            Console.WriteLine("1-ax+b, 2- ax^2+bx+c, 3-ax^3+bx^2+cx+d ");
            int a = int.Parse(Console.ReadLine());
            switch (a)
            {
                case 1: f = new Function(Program.Test1.f1()); break;
                case 2: f = new Function(Program.Test1.f2()); break;
                case 3: f = new Function(Program.Test1.f3()); break;

            }

            Solution s;
            Console.WriteLine("1- Отрезки, 2- Хорды, 3- Касательные");
            a = int.Parse(Console.ReadLine());
            switch (a)
            {
                case 1: f = new Solution(Program.Test1.f1()); break;
                case 2: f = new Solution(Program.Test1.f2()); break;
                case 3: f = new Solution(Program.Test1.f3()); break;

            }

            Console.ReadKey();
        }
    }
}