using System;

public class Program

{

    public static void Main()

    {

        string userChoice = "";

        int count = 0;

        const int MAX_DOGS = 50;

        int[] weight = new int[MAX_DOGS];

        string[] name = new string[MAX_DOGS];

        while (userChoice != "5") //sentinel value

        {

            if (count < MAX_DOGS)

            {

                Console.WriteLine ("Enter 1 to enter name and weight");

            }

            Console.WriteLine("Enter 2 to get average");

            Console.WriteLine("Enter 3 to display all");

            Console.WriteLine("Enter 4 to find a name");

            Console.WriteLine("Enter 5 to exit");

            userChoice = Console.ReadLine();

            switch (userChoice)

            {

                case "1":

                    if (count < MAX_DOGS)

                    {

                        EnterWeight(ref count, weight, name);

                    }

                    break;

                case "2":

                    GetAverage(count, weight);

                    break;

                case "3":

                    DisplayAllWeights(count, weight, name);

                    break;

                case "4":

                    int sub;

                    string lookup = Console.ReadLine();

                    sub = FindName(count, name, lookup);

                    DisplayDog(name, weight, sub);

                    break;

                case "5":

                    break;

                default:

                    break;

            }

        }

    }

    static void EnterWeight (ref int count, int[] weight, string [] name)

    {

        Console.WriteLine("please enter name");

        name[count] = Console.ReadLine();

        Console.WriteLine("please enter weight");

        weight[count] = int.Parse(Console.ReadLine());

        count++;

    }

    static void GetAverage (int count, int[] weight)

    {

        int totalWeight = 0;

        for (int x =0; x < count; x++)

        {

            totalWeight += weight[x];

        }

        Console.WriteLine("Average weight is " + totalWeight / count);

        Console.ReadLine();

    }

    static void DisplayAllWeights (int count, int[] weight, string [] name)

    {

        for(int x = 0; x < count; x++)

        {

            Console.WriteLine(name[x] + " weighs " + weight[x]);

        }

        Console.ReadLine();

    }

    static int FindName (int count, string [] name, string lookup)

    {

        int returnval = 500;

        for (int x = 0; x < count; x++)

        {

            if(lookup == name[x])

            {

                returnval = x;

            }

        }

        return returnval;

    }

    static void DisplayDog (string [] name, int [] weight, int sub)

    {

        if (sub == 500)

        {

            Console.WriteLine("dog not found");

        }

        else

        {

            Console.WriteLine(name[sub] + " " + weight[sub]);

        }

        Console.ReadLine();

    }

}