Main Menu for a mastermind game

Question

I am trying to create the menu for a mastermind game which can be ran in a command prompt using C#. The issue I am running into is capturing the users input for the menu. If they enter a 2 then it should display that they entered the number two and if not then it would say they have not displayed the number two.

The issue I am having is that it wont turn the users input into a working integer and will either come up saying that it can't explicitly convert from System.ConsoleKeyInfo to int or string to int.

using System;

namespace MasterMind
{
    class Program
    {
        static void Main(string[] args)
        {

            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("               MasterMind's Main Menu");
            Console.WriteLine("                    1: Play");
            Console.WriteLine("                    2: Help");
            Console.WriteLine("                    0: Exit");
            int userinput = Console.ReadKey();
            if (Nuserinput == 2);
            {
                Console.WriteLine("This is a number 2");
            }
            else
            {
                Console.WriteLine("This is not a number 2");
            }
        }
    }
}

Console.ReadKey() Doc: https://msdn.microsoft.com/en-us/library/471w8d85%28v=vs.110%29.aspx?f=255&MSPPError=-2147217396 — JohnLBevan, Apr 20 '17 at 16:08
Please just read the documentation online for `Console.ReadKey()`. It does not do what you think. (and this has been asked many times). — crashmstr, Apr 20 '17 at 16:08
ConsoleKeyInfo Doc: https://msdn.microsoft.com/en-us/library/system.consolekeyinfo.keychar(v=vs.110).aspx — JohnLBevan, Apr 20 '17 at 16:09
Char to Int info: http://stackoverflow.com/questions/3665757/how-to-convert-char-to-int — JohnLBevan, Apr 20 '17 at 16:09

score 5 · Answer 1 · answered Apr 20 '17 at 16:11

Console.ReadKey() returns a ConsoleKeyInfo object, which is not an int object. You can get a char from that, for example:

var key = Console.ReadKey();
var keyChar = key.KeyChar;

If you expect that char value to represent an integer, you can convert it to one:

int keyInt = (int)Char.GetNumericValue(keyChar);

Aside from other error checking you might want to put in place in case the user doesn't enter a valid integer, this would at least get your the integer value you're looking for.

score 3 · Answer 2 · answered Apr 20 '17 at 16:09

Console.ReadKey() returns a ConsoleKeyInfo, so you'll need to do something like this:

ConsoleKeyInfo data = Console.ReadKey();
int num;
if (int.TryParse(data.KeyChar.ToString(), out num) && num == 2)
{
    Console.WriteLine("This is a number 2");
}else{
    Console.WriteLine("This is not a number 2");
}

EpicKip · Accepted Answer · 2017-04-20T16:33:11.723

0

Change your

int userinput = Console.ReadKey();
if (Nuserinput == 2)

To:

string userInput = Console.ReadKey().KeyChar.ToString();
if(input == "2")

Or covert the string to an int as shown in other answers. But for this, a string works fine.

edited Apr 20 '17 at 16:33

answered Apr 20 '17 at 16:12

EpicKip

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Main Menu for a mastermind game

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