using System;

public class Program

{

    public static void Main()

    {

        /*

        // Complaints from the client:

        // COMPLAINT1: Code crashes if I make a mistake (ANNOYING!)

        // SOLUTION: Try catch around code

        in the catch, tell user there's an error, then clear console

        // COMPLAINT2: I want the screen to refresh every time I do something

        // SOLUTION:. Console.WriteLine("Would you like to refresh? Type Yes to refresh.");

                        userInput = Console.ReadLine();

                        if (userInput == "Yes" || userInput == "yes")

                        {

                        Console.Clear();

                        }

        // COMPLAINT3: After I type my two integers, I want it to show me the entire addition problem. I sometimes forget what numbers I typed in!

        // SOLUTION: Console.WriteLine(a " plus " + b " equals " a+b);

        // COMPLAINT4: When the code restarts, everything else is STILL THERE! ew!

        // SOLUTION: Console.Clear();

        // COMPLAINT5: I know I need to type "n" to end the program, but no one else does!! Maybe make it "N"? Or??

        // SOLUTION:        

            if(Console.ReadLine()=="n" || Console.ReadLine() =="N")

        // ADDING CODE:

        // This code takes two user generated string-integers, converts them to integers, and then displays the addition solution.

        // There is a choice to restart the program again at the end.

                */

        string a = "";

        string b = "";

        int x = 0;

        int y = 0;

            Console.WriteLine("Integer Subtraction Calculator.");

        Console.WriteLine("This application subtracts two integers.");

        Console.WriteLine("Directions: Please type in your integer when asked to do so by simply pressing the numbers on your keyboard.");

        Console.WriteLine();

        Console.WriteLine("What is the first integer:");

        a = Console.ReadLine();

        Console.Clear();

        Console.WriteLine("What is the second integer:");

        b = Console.ReadLine();

        Console.Clear();

​

        //THIS IS WHERE IT CRASHES

        try

        {

        x = Int32.Parse(a); //Int32.Parse = Convert.ToInt32

        y = Int32.Parse(b); //Int32.Parse = Convert.ToInt32

        }

        catch (Exception e)

        {

​

            Console.WriteLine("Remember to click NUMBERS not LETTERS or other characters. Please try again.");

            Console.ReadLine();

        Console.Clear();

            Main();

        }

         Console.WriteLine(x + " - " + y + " =");

         Console.WriteLine(x-y);

        Console.WriteLine();

        Console.WriteLine("Would you like to restart the program? Press enter to restart or Press E to Exit");

        if( Console.ReadLine() =="")

        {

            Console.Clear();

        Main();

        }

    else

    {

        Console.Clear();

        Console.WriteLine("GoodBye!");

    }

    }

}

​

​

​

​