Question

I need a little help with a Random Number Guessing Game in visual studio. I got the brunt of the code down but I am having troubles with the Random number generator and getting the random number to port into the click events. As always, I don’t really need code but some guidance and/or explanations as to what I am doing wrong and if there is a more effecient way to do things in the beginner phases of learning. Below is my code, the comments are the parts where I am having troubles. Thanks for any help as the help I’ve recieved to date as been phenominal.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace LAB6B
{
    public partial class game : Form
    {
        public game()
        {
            InitializeComponent();

            //Generate Random number between 1 and 100
         //Not sure if there is a better way?
            Random rand1 = new Random();
            int num1 = rand1.Next(1,50);
            int num2 = rand1.Next(1,50);
            int answer = num1 + num2;

        }

        private void evaluate_Click(object sender, EventArgs e)
        {
            int count = 0;
            int choice = Convert.ToInt32(guess);


            if (guess.Text != string.Empty)
            {
                // set counter to keep track of how many tries
                // should this be done by a loop or will it count without a loop?
                count++;

                //compare user input against random number
          //Can’t import the random number for comparision
                if (choice < answer)
                {
                    Evaluate.Visible = false;
                    lblMessage.Visible = true;
                    lblMessage.Text = "Too Low!";
                    Clear.Visible = true;
                    BackColor = Color.LightSeaGreen;
                }
                else if (choice > answer)
                {
                    Evaluate.Visible = false;
                    lblMessage.Visible = true;
                    lblMessage.Text = "Too High!";
                    Clear.Visible = true;
                    BackColor = Color.SlateBlue;
                }
                else
                {
                    //Display correct message along with how many times it took to get it
                    MessageBox.Show(" Eso es CORRECTO! It took you {0} tries. ", count);
                }
            }
        }

        private void Clear_Click(object sender, EventArgs e)
        {
            guess.Text = "";
            Evaluate.Visible = true;
            lblMessage.Visible = false;
            Clear.Visible = false;
            BackColor = Color.PowderBlue;
        }
    }
}

Answer 1

As the rand1 and answer variables are defined within the constructor, you can only access them in the constructor. Defining answer on the class level will solve most of the problems, as you will be able to access it both from the constructor and the click handlers, like this:

private int answer;
private int count;

public game()
{
  InitializeComponent();

  //Generate Random number between 1 and 100
  Random random= new Random();
  // no need for num1 and num2, it's just as random
  answer = random.Next(1,101);
}