C#•2mo ago

Can't declare variables not in main?

All of my variables in Main and playLottery have the error line underneath them. How come

//Lab Exercise 6.3.2024 Problem 1
//Author: Tucker Sopha

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Problem_1
{
    class Program
    {
        List<int> yourWhiteBalls = new List<int>();
        int yourPowerBall;

        List<int> winningWhiteBalls = new List<int>();
        int winningPowerBall = -1;
        bool win = false;
        int numberOfPlays;
        Random r = new Random();
        static void Main(string[] args)
        {
            //Declare variables



            //Generate 5 numbers
            for (int i = 0; i < 5; i++)
            {
                yourWhiteBalls.Add(r.Next(1, 70));
            }
            //Sort the list
            yourWhiteBalls.Sort();
            //Pick the PowerBall
            yourPowerBall = r.Next(1, 27);


            //Print the picks and the PowerBall
            printLottery(yourWhiteBalls, yourPowerBall);

           
        }
        static void playLottery()
        {
            while (!win)
            {
                for (int i = 0; i < 5; i++)
                {
                    winningWhiteBalls.Add(r.Next(1, 70));
                }
                winningWhiteBalls.Sort();
                winningPowerBall = r.Next(1, 27);

                if (yourPowerBall == winningPowerBall)
                {
                    continue;
                }

                for (int i = 0; i < 5; i++)
                {

                }
            }
        }
    }
}

//Lab Exercise 6.3.2024 Problem 1
//Author: Tucker Sopha

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace Problem_1
{
    class Program
    {
        List<int> yourWhiteBalls = new List<int>();
        int yourPowerBall;

        List<int> winningWhiteBalls = new List<int>();
        int winningPowerBall = -1;
        bool win = false;
        int numberOfPlays;
        Random r = new Random();
        static void Main(string[] args)
        {
            //Declare variables



            //Generate 5 numbers
            for (int i = 0; i < 5; i++)
            {
                yourWhiteBalls.Add(r.Next(1, 70));
            }
            //Sort the list
            yourWhiteBalls.Sort();
            //Pick the PowerBall
            yourPowerBall = r.Next(1, 27);


            //Print the picks and the PowerBall
            printLottery(yourWhiteBalls, yourPowerBall);

           
        }
        static void playLottery()
        {
            while (!win)
            {
                for (int i = 0; i < 5; i++)
                {
                    winningWhiteBalls.Add(r.Next(1, 70));
                }
                winningWhiteBalls.Sort();
                winningPowerBall = r.Next(1, 27);

                if (yourPowerBall == winningPowerBall)
                {
                    continue;
                }

                for (int i = 0; i < 5; i++)
                {

                }
            }
        }
    }
}

5 Replies

reflectronic•2mo ago

the problem is that they are instance variables of Program it means you need an instance of Program to access them e.g. new Program().r and you could of course make multiple different instances of Program, which all have different values, which is probably not what you want

TuckBuckk•2mo ago

ah so make them static

reflectronic•2mo ago

yes, that one one way to fix it

TuckBuckk•2mo ago

sweet ty

Angius•2mo ago

One pattern I really like for making games like this is a game instance

// Game.cs
public sealed class Game
{
    private int _score;

    public void Run()
    {
        // ...
    }
}

// Game.cs
public sealed class Game
{
    private int _score;

    public void Run()
    {
        // ...
    }
}

// Program.cs
var gameInstance = new Game();
gameInstance.Run();

// Program.cs
var gameInstance = new Game();
gameInstance.Run();

Could easily make the game replayable too, and make resetting the game state super easy

// Game.cs
public sealed class Game
{
    private int _score;

    public bool Run()
    {
        // ...
    }
}

// Game.cs
public sealed class Game
{
    private int _score;

    public bool Run()
    {
        // ...
    }
}

// Program.cs
var gameInstance = new Game();
while (gameInstance.Run())
{
    Console.WriteLine("New game begins!");
    gameInstance = new Game();
}
Console.WriteLine("Thanks for playing!");

// Program.cs
var gameInstance = new Game();
while (gameInstance.Run())
{
    Console.WriteLine("New game begins!");
    gameInstance = new Game();
}
Console.WriteLine("Thanks for playing!");

Gaming

Programming

Can't declare variables not in main?