using System;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Which program would you like to run?");

        string choice = Console.ReadLine();

        switch (choice)

        {

                case "1":

                    Console.WriteLine(prog1());

                    break;

                case "2":

                    Console.WriteLine(prog2());

                    break;

                case"3":

                    Console.WriteLine(prog3());

                    break;

                case "4":

                    Console.WriteLine(prog4());

                    break;

                case "5":

                    prog5();

                    break;

                case"6":

                    Console.WriteLine(prog6());

                    break;

                default:

                    Console.WriteLine("Invalid Choice!");

                    break;

            }

        } //end of main

    public static double prog1()

  {

        int num1, num2, num3;

        double average;

        Console.WriteLine ("Enter number:");

        num1 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine ("Enter number:");

        num2 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine ("Enter number:");

        num3 = Convert.ToInt32(Console.ReadLine());

        average = num1 + num2 + num3;

        average = average / 3;

        return average;

  }//end of program 1

public static int prog2()

  {

    int num1, num2;

        Console.WriteLine ("Enter number:");

        num1 = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine ("Enter number:");

        num2 = Convert.ToInt32(Console.ReadLine());

    if(num1 > num2)

    {

        return num1;

    }

    else

    {

        return num2;

    }

  }//end of program 2

​

public static int prog3()

  {

    int total = 0;

        for(int i = 0; i <= 100; i++)

        {

            total += i;

        }

    return total;

  }//end of program 3

  public static string[] prog4()

  {

    int timesTableOf, upTo = 0;

        Console.WriteLine("Which times table would you like to output?");

        timesTableOf = Convert.ToInt32(Console.ReadLine());

        Console.WriteLine("How far would you like to go?");

        upTo = Convert.ToInt32(Console.ReadLine());

      string[] timestables = new string[upTo + 1];

        for (int i = 0; i <= upTo; i++)

        {

            timestables[i] = i + " x " + timesTableOf + " = " + (i * timesTableOf);

        }

      return timestables;

  }//end of program 4

​

public static void prog5()

  {

    Random rnd = new Random();

    int num = rnd.Next(11);

    int guess;

    bool guessed = false;

    while(guessed == false)

    {

        Console.WriteLine("Guess a number 1 - 10");

        guess = Convert.ToInt32(Console.ReadLine()); 

        if(guess == num)

        {

            Console.WriteLine("Correct!");

            guessed = true;

        }

        else

        {

            Console.WriteLine("Incorrect");

        }

    }

  }//end of program 5

public static int prog6()

  {

    int[] array = {7,12,4,21,8,9};

    int largest = 0;

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

    {

        if(array[i] > largest)

        {

            largest = array[i];

        }

    }

    return largest;

  }//end of program 6

​

​

}//end of everything