using System;

​

class Program

{

    static void Main()

    {

        Console.WriteLine("***One-Dimensional Arrays***");

        DisplayArray();

        LengthArray();

        SortArray();

        IndexArray();

        SkiJumpScores();

        Console.WriteLine("***Program End***");

    }

​

    static void DisplayArray()

    {

        Console.WriteLine("***Display Array***");

        int[] numbers = new int[5];

        for (int i = 0; i < numbers.Length; i++)

        {

            Console.Write($"Enter number {i + 1}: ");

            numbers[i] = Convert.ToInt32(Console.ReadLine());

        }

​

        for (int i = 0; i < numbers.Length; i++)

        {

            Console.WriteLine($"Number {i + 1}: {numbers[i]}");

        }

    }

​

    static void LengthArray()

    {

        Console.WriteLine("***Length of Array***");

        string[] names = new string[5];

        for (int i = 0; i < names.Length; i++)

        {

            Console.Write($"Enter name {i + 1}: ");

            names[i] = Console.ReadLine();

        }

​

        for (int i = 0; i < names.Length; i++)

        {

            Console.WriteLine($"Name {i + 1}: {names[i]}");

        }

​

        Console.WriteLine($"Length of Array: {names.Length}");

    }

​

    static void SortArray()

    {

        Console.WriteLine("***Sort Array***");

        string[] cities = new string[5];

        for (int i = 0; i < cities.Length; i++)

        {

            Console.Write($"Enter city {i + 1}: ");

            cities[i] = Console.ReadLine();

        }

​

        Console.WriteLine("*Unsorted Cities*");

        for (int i = 0; i < cities.Length; i++)

        {

            Console.WriteLine($"City {i + 1}: {cities[i]}");

        }

​

        Array.Sort(cities);

        Console.WriteLine("*Sorted Cities*");

        for (int i = 0; i < cities.Length; i++)

        {

            Console.WriteLine($"City {i + 1}: {cities[i]}");

        }

    }

​

    static void IndexArray()

    {

        Console.WriteLine("***IndexOf Array***");

        float[] values =

        {

            1.3f,

            2.4f,

            3.5f,

            4.6f,

            5.7f

        };

        int index = Array.IndexOf(values, 4.6f);

        Console.WriteLine($"Index of 4.6: {index}");

    }

​

    static void SkiJumpScores()

    {

        Console.WriteLine("***Ski Jump Scores***");

        float[] skiJumpScores = new float[10];

        float sum = 0;

        for (int i = 0; i < skiJumpScores.Length; i++)

        {

            Console.Write($"Please enter ski jump score {i + 1}: ");

            skiJumpScores[i] = float.Parse(Console.ReadLine());

            sum += skiJumpScores[i];

        }

​

        Array.Sort(skiJumpScores);

        Array.Reverse(skiJumpScores);

        for (int i = 0; i < skiJumpScores.Length; i++)

        {

            Console.WriteLine($"Score {i + 1}: {skiJumpScores[i]}");

        }

​

        float average = sum / skiJumpScores.Length;

        Console.WriteLine($"Average score: {Math.Round(average, 2)}");

    }

}