using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("This program calculates the average of 3 integers");

        Console.WriteLine("-----------------------------------------------");

        Console.WriteLine("Please specify the value of the first integer");

        int firstNumber = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Please specify the value of the second integer");

        int secondNumber = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("Please specify the value of the third integer");

        int thirdNumber = Convert.ToInt32(Console.ReadLine());

    }

​

    public static int Sum(int a, int b, int c)

    {

        int result = a + b + c;

        return result;

    }

​

    public static double Average(int a, int b, int c)

    {

        int sum = Sum(a, b, c);

        double average = (double)sum / 3;

        return average;

    }

}