using System;

public class Program

{

    public static void Main()

    {       

        double[] inputs = new [] 

        {

            9.1, 3, -2, 0

        };

        foreach(double d in inputs)

        {

            Console.WriteLine("Input:  \t{0}", d);

            Console.WriteLine("Floor:  \t{0}", GetNextWholeNumberFloor(d));

            Console.WriteLine("Casting:\t{0}", GetNextWholeNumberCasting(d));

            Console.WriteLine();

        }

    }

    private static double GetNextWholeNumberFloor(double input)

    {

        return Math.Floor(input + 1);

    }

    private static double GetNextWholeNumberCasting(double input)

    {

        return (int)input + 1;

    }

}