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Calling a variable from child class in parent class in c#

I am trying to raed the value of userInput variable in my parent class which is stored in my child class, but I can't reach it and I get many errors one after one after each try. Can you please help me?
This is apart of my code:
//Child class
class tictactoe
{
public void beginGame()
{
ConsoleKeyInfo gebruikerInvoer;
gebruikerInvoer = Console.ReadKey();
//Rest of code
}
}
//Parent class
namespace Quizz
{
class Program
{
public static void Main(string[] args)
{
tictactoe minigame1 = new tictactoe();
while (minigame1.gebruikerInvoer)
{
//Rest of code
}
}
}
}
This is the error I get
'tictactoe' does not contain a definition for 'gebruikerInvoer' and no accessible extension method 'gebruikerInvoer' accepting a first argument of type 'tictactoe' could be found (are you missing a using directive or an assembly reference?)
I think that I will need to make a method to call it from the parent, if so: what type should I give since the variable is a ConsoleKeyInfo that is later converted to string?
gebruikerInvoer.KeyChar.ToString()

As the comments have made apparent, you need to first make the variable visible to the outside world. Local variables are always hidden from other classes. So lets fix this first:
class tictactoe
{
public ConsoleKeyInfo gebruikerInvoer; //Make public and move owner to class not method
public void beginGame()
{
gebruikerInvoer = Console.ReadKey();
//Rest of code
}
}
//Parent class
namespace Quizz
{
class Program
{
public static void Main(string[] args)
{
tictactoe minigame1 = new tictactoe();
while (minigame1.gebruikerInvoer) //CS0029 ConsoleKeyInfo cannot be implicitly converted to type Bool
{
//Rest of code
}
}
}
}
Moving on from there you need to define a statement to test the variable's value in a way that can return a true or false statement to use a while loop. To fix that we can do something like this:
class tictactoe
{
public ConsoleKeyInfo gebruikerInvoer;
public void beginGame()
{
gebruikerInvoer = Console.ReadKey();
//Rest of code
}
}
//Parent class
namespace Quizz
{
class Program
{
public static void Main(string[] args)
{
tictactoe minigame1 = new tictactoe();
bool minigameRun = minigame1.gebruikerInvoer.KeyChar == 't'
? true : false; //Assign a true value if the user entered the letter 't', else false
while (minigameRun) //Runs rest of code while minigameRun is true
{
//Rest of code
}
}
}
}
Then to escape the while loop you can use return, break, or upon some condition change the local bool minigameRun to false. The bool is initially assigned in this code using the ?: operator. You can read more about its use here

Do functions execute loops when called?

I'm trying to write a program that consists of some items (only 2 of them for now). It doesn't show any errors in the console, but when I try to call the Main function more than once, it doesn't execute the loops inside. Here's the code by the way.
public static class Program
{
public static string input = Convert.ToString(Console.ReadLine());
public static int health = 100;
public static int energy = 100;
public static void Main()
{
Console.WriteLine("This is a game used for testing items");
Console.WriteLine("Would you like to use items or get them? (Typing in status shows the value of your health and energy)");
if (Program.input == "get")
{
Items.GetItems();
}
if (Program.input == "use")
{
ItemUser();
}
if (Program.input == "status")
{
StatusChecker();
}
}
public static void StatusChecker()
{
Console.WriteLine("Your health is " + Program.health);
Console.WriteLine("Your energy is " + Program.energy);
}
public static void ItemUser()
{
Console.WriteLine("What do you want to use?");
string useChecker = Convert.ToString(Console.ReadLine());
if (useChecker == "healthPotion")
{
health += 100;
Items.healthPotion--;
}
if (useChecker == "energyDrink")
{
energy += 100;
Items.energyDrink--;
}
}
}
public static class Items
{
public static int healthPotion = 0;
public static int energyDrink = 0;
public static void GetItems()
{
Console.WriteLine();
string itemChecker = Convert.ToString(Console.ReadLine());
if ( itemChecker == "health potion")
{
healthPotion++;
Program.Main();
}
if (itemChecker == "energy drink")
{
energyDrink++;
Program.Main();
}
}
So I wanted the program to get the values after updating them, but it just stops after I call Main method more than once. Can anyone help me?
(I'm not that great at coding so I couldn't make really efficient code)

You don't have any loops inside your Main method and every time you run the application you start from scratch and each of your variables contain initial values. If I get right what you're trying to achieve, I would suggest you to write the Main method like this to have loop which will ask a user for a command until the user enters "quit":
static void Main(string[] args)
{
Console.WriteLine("This is a game used for testing items");
while (true)
{
Console.WriteLine("Would you like to use items or get them? (Typing in status shows the value of your health and energy)");
string userAnswer = Console.ReadLine();
if (userAnswer == "quit") break;
if (userAnswer == "get")
{
Items.GetItems();
}
if (userAnswer == "use")
{
ItemUser();
}
if (userAnswer == "status")
{
StatusChecker();
}
}
}
I noticed also that when you call ItemUser method you update static variables of your Items class, but in the StatusChecker method you write to the console variables of your Program class. They are actually different, so I think in your StatusChecker method you may want do the following:
public static void StatusChecker()
{
Console.WriteLine("Your health is " + Items.health);
Console.WriteLine("Your energy is " + Items.energy);
}

You are assigning a variable here:
public static string input = Convert.ToString(Console.ReadLine());
So the next time you call your "Main" method it will use the value you typed in the first time your app executed. If you want it to ask each time you'll need to do something like this:
public static void Main()
{
input = Convert.ToString(Console.ReadLine());
...
}
Another thing is that it can exit after the first call if you type in i.e. "status".
Issue number 3 is that this is not the "nice" way to write a program. The Main method is supposed to be executed when your app starts as it is the entry point (more on that here).

Error CS0649, Program will not display a variable in the defined UI

class Program
{
public static string playerName;
static void Main(string[] args)
{
playerName = Console.ReadLine();
}
public static void userInterface()
{
Console.Writeline("Name:" + playerName)
}
}
Been trying to understand where im falling short for a few hours now and cannot figure it out, wondering if any of the SO residents can help me.
Im trying to display a inputted username in a GUI using C# console, I have defined it as a public variable in the class and called it in the method, however its throwing me this exception and displaying a null value?
Any help is appreciated.Class and Main The method im trying to call the variable to
EDIT the desired aim is to have the program display the users inputted username in the UI at the top of the console

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApp1
{
class Program
{
static void Main(string[] args)
{
Player player = new Player
{
Name = "name coming from your input class"
};
UserInterface userInterface = new UserInterface(player);
}
}
class UserInterface
{
public UserInterface(Player player)
{
Console.SetWindowSize(220, 55);
Console.WriteLine("Name: {0}", player.Name);
}
}
class Player
{
public string Name { get; set; }
}
}
Or something alike. So you need to provide values for your variables.

Just call the method userInterface() after this line playerName = Console.ReadLine();
this will display the accepted value on console.

Variable scope problems C#

I'm learning C# and i'm having problems with variable scope in my simple console program.
The program runs perfectly so far except I know I will encounter issues when trying to reference variables previously instantiated.
I have tried to change methods from static to non static and also applied public/private access but to no avail.
I just need a nudge in the right direction, hope someone can help!
The error message i'm getting is :
Error 1 An object reference is required for the non-static field, method, or property 'ConsoleApplication2.Program.game()'
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication2
{
public class Program
{
int numberToGuess;
int numberGuessed;
int triesRemaining;
public void game()
{
Console.WriteLine(" ==Welcome to Guess My Number== \n");
Console.WriteLine("Player 1: Please enter your number to guess between 1 and 20: \n");
numberToGuess = int.Parse(Console.ReadLine());
Console.WriteLine("Player 2, please enter your first guess, you have 7 tries: \n");
numberGuessed = int.Parse(Console.ReadLine());
if (numberGuessed == numberToGuess)
{
correct();
}
else
{
incorrect();
}
}
public void correct()
{
Console.WriteLine("Congratulations, the number was in fact " + numberToGuess);
}
public void incorrect()
{
}
static void Main(string[] args)
{
game();
}
}
}

instance members (those not marked with the static keyword) exist once per object instance. Every instance of an object gets its own copies of them.
static members, on the other hand, exist once for the entire class and are shared by all object instances.
So, If you've got a class:
class Foo
{
public static int Alpha { get ; set ; }
public int Bravo { get ; set ; }
}
No matter how many instances of your Foo class are created, there is only one instance of Alpha. Any instance method or property can access a static member directly.
Instance members, since they exist on a per-instance basic, require an object instance to reference them. If you add some methods to the Foo class:
public static int DoSomething()
{
return Alpha * 3 ;
}
is perfectly valid — the method is static and the member is static. Ditto for an instance method:
public int DoSomethingElse()
{
return Alpha * 3 ;
}
Something like this will fail:
public static int AndNowForSomethingCompletelyDifferent()
{
return Alpha * 3 + Bravo ;
}
Bravo can't be referenced here without a reference to an instance of Foo. This will work however:
public static int AndNowForSomethingCompletelyDifferent( Foo instance )
{
return Alpha * 3 + instance.Bravo ;
}
As will this:
public int AndNowForSomethingCompletelyDifferent()
{
return Alpha * 3 + Bravo ;
}
Since the method is non-static (an instance method), it has an implicit reference (this) to its instance of Foo. The above is exactly equivalent to
public int AndNowForSomethingCompletelyDifferent()
{
return Alpha * 3 + this.Bravo ;
}
In your case, you could instantiate the class Program in your Main() method:
public static void Main( string[] args )
{
Program p = new Program() ;
p.game() ;
return ;
}
Or you could mark your methods game(), correct() and incorrect() as static, just as the Main() method is marked.
Hope this helps!

static methods/fields belong to the user-defined type, not the instance.
For example, if you look at this piece of code:
public class MyClass
{
public static void Foo()
{
}
}
the Foo() method, is not accessed from an instance of MyClass. Since it is static, you access it from the user-defined type itself. Ex:
public class Program
{
static void Main(String[] args)
{
MyClass.Foo();
}
}
Since Main() is static, you can only reference static methods or variables inside it (this excludes methods referenced from local instance variables).
In your code, the method game() and the fields/methods being called/invoked by game are not static, therefore you would only be able to access it via an object instance. Of course, making game() and all the other fields/methods static would result in a working piece of code.
For more information on static types, look here: http://msdn.microsoft.com/en-us/library/98f28cdx.aspx

I have gone on to complete the methods and it seems to be working great!
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication2
{
public class Program
{
int numberToGuess;
int numberGuessed;
int triesRemaining = 7;
string playAgain;
string player1, player2;
public void game() //Initiates the game instance
{
Console.WriteLine(" ==Welcome to Guess My Number== \n");
Console.WriteLine(" Player 1, Please enter your name: \n");
player1 = Console.ReadLine();
Console.Clear();
Console.WriteLine(" ==Guess My Number== \n");
Console.WriteLine("Hello " + player1 + " : Please enter your number to guess between 1 and 20: \n");
numberToGuess = int.Parse(Console.ReadLine());
Console.Clear();
Console.WriteLine(" ==Guess My Number== \n");
Console.WriteLine(" Player 2, Please enter your name: \n");
player2 = Console.ReadLine();
Console.Clear();
Console.WriteLine("Hello " + player2 + " please enter your first guess, you have 7 tries: \n");
numberGuessed = int.Parse(Console.ReadLine());
if (numberGuessed == numberToGuess)
{
Console.WriteLine("Congratulations, the number was in fact " + numberToGuess);
newGame();
}
else
{
incorrect();
}
}
public void incorrect() //Method for dealing with incorrect answers
{
for (int x = 0; x < 6; x++)
{
triesRemaining--;
Console.WriteLine("Incorrect, you have " + triesRemaining + " tries remaining \n");
Console.WriteLine(player2 + ", please enter your next guess: \n");
numberGuessed = int.Parse(Console.ReadLine());
if (numberGuessed == numberToGuess)
{
Console.WriteLine("Congratulations, the number was in fact " + numberToGuess);
newGame();
}
else {
//Do nothing
}
}
Console.WriteLine("You have used up all your tries! You have failed. The number was: " +numberToGuess + "\n");
newGame();
} //Method for dealing with incorrect answers
public void newGame() //Method that gives the user the option to start a new game instance
{
Console.WriteLine("Would you like to play again? Type yes or no: \n");
playAgain = Console.ReadLine();
playAgain = playAgain.ToLower();
if (playAgain == "yes")
{
Console.Clear();
game();
}
else if (playAgain == "y")
{
game();
}
else
{
//Do nothing
}
}
static void Main(string[] args)
{
new Program().game();
}
}
}

No overload takes '0' arguments [c#]

I am getting an error of "No overload takes 0 args" at the Start(); line in my main method. I do not know how to fix it, and I've searched around and couldn't find anything.
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
class Program
{
public static void main(string[] args)
{
Start();
}
public static string Start(string move)
{
Console.Write("");
string gameType = Console.ReadLine();
if (gameType == "s")
{
Console.Write("");
begin:
Console.Write("\nEnter your move: ");
move = Console.ReadLine();
switch (move)
{
case "r":
Console.Write("s");
Console.ReadLine();
break;
case "s":
Console.Write("");
Console.ReadLine();
break;
case "f":
Console.Write("");
Console.ReadLine();
break;
default:
Console.Write("\nInvalid move, try again\n\n");
goto begin;
}
Console.ReadLine();
return move;
}
else
{
return move;
}
}
static string Genius(string genius, string move)
{
Console.Write(move);
return genius;
}
}
}

The method call to Start should should be
Start("Something");
Edit: as others have pointed out: there is no point in passing anything to Start(). The move value passed in is ignored and replaced by whatever is read from the console. Therefore I suggest simply removing the argument from the Start() method signature so it just reads
public static string Start()

Since you are reading the move from the console, remove the string move from the parameter definition of Start and move it inside as a local variable and it should be fine:
public static string Start()
{ string move;
...
And btw, your main should be Main - in c# the main should have a capital M!
I recommend you read some basics of C#.

Hint: this is your method call:
Start();
and this is the method's signature:
public static string Start(string move)
There is a mismatch between them...

Your Start(arg) should be like:
private static string Start()
{
string move = null;
...
}

The start method expects a string as a parameter:
Examples:
Start("r");
Start("s");
Start("f");

You should either pass an argument when Start() is called (as Anders suggested) or you should remove the argument from Start() and declare it as a local variable instead:
public static string Start()
{
string move = string.Empty;