Практикум 3, задание 6, номер 12

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace mainSolution
{
    public class MyException : Exception
    {
        public MyException(string messege) : base(message: messege + "\n\n\n Exception founded by Decibit\n\n\n") { }
        public MyException() : base()
        {

        }
        public void Messsage()
        {
            Console.WriteLine("\n\n\n\n\n\n Invalid number, please enter a number from 1 to 12 \n\n\n\n\n\n");
        }


    }
    class Input
    {
        private static IEnumerator<string> getin()
        {
            while (true)
                foreach (string s in Console.ReadLine().Split().Where(x => x.Length > 0))
                    yield return s;
        }

        private IEnumerator<string> inp = getin();

        public string GetString() { inp.MoveNext(); return inp.Current; }
        public int GetInt() { return int.Parse(GetString()); }
        public long GetLong() { return long.Parse(GetString()); }
        public double GetDouble() { return double.Parse(GetString()); }
    }

    static class Program
    {
        static public Input cin = new Input();

        const double EPS = 1e-15;
        static double abs(double a) => a < 0? -a : a;
        static double func(double x)
        {
            if (abs(x - 1) < EPS)
            {
                return 1;
            }
            if (x + EPS < 0)
            {
                return 0;
            }
            return x * x + 1;
        }
        static void Main(string[] args)
        {
            double a = cin.GetDouble();
            double b = cin.GetDouble();
            double h = cin.GetDouble();
            for (double x = a; x <= b + EPS; x += h)
                Console.WriteLine($"{func(x)}");

        }
    }

}