practice exam question please help

Christiaan Potgieter

In a simplified lotto game, six numbers between 1 and 49 are generated for a player and one number also between 1 and 49 is generated for the computer. The computer's number is then compared with each of the six numbers of the player. If there is a match the player wins.

• Create a new "Windows Form" project "Question 2" and create an interface as in Figures 2.1
and 2.2.

• The form contains a globally defined object to create random numbers.

• When the "Play" button is clicked:

o Randomly generate six numbers between 1 and 49 for the player. o Use a globally defined array to store the generated numbers.
o Display the generated numbers in a listbox.

o The label is used to specify the number of draws.

o For the computer- generate a random number between 1 and 49 and display it in a
textbox.

o Count the number of wins and the number of losses. A win is determined by comparing
the computer's generated number to see if it matches a number in the array of the player.

• When the "Show" button is clicked, the number of losses and number of wins should be
displayed in the ListBox.

4 Replies

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Vulpes11y ago
Accepted answer
Here's some code for that:

public partial class Form1 : Form
{
public static Random rand = new Random();
public static int[] playerNumbers = new int[6];
private int wins = 0, losses = 0, draws = 0;

public Form1()
{
InitializeComponent();
}

private void btnPlay_Click(object sender, EventArgs e)
{
draws++;
label1.Text = draws.ToString(); // presumably draws means number of times numbers drawn?
listBox1.Items.Clear();

for (int i = 0; i < 6; i++)
{
int playerNum = rand.Next(1, 50);

// presumably the 6 player numbers should be distinct
if(Array.IndexOf(playerNumbers, playerNum) == -1)
{
playerNumbers[i] = playerNum;
listBox1.Items.Add(playerNumbers[i]);
}
else
{
--i;
}
}

int computerNumber = rand.Next(1, 50);
textBox1.Text = computerNumber.ToString();

bool hasWon = false;

foreach (int playerNumber in playerNumbers)
{
if (playerNumber == computerNumber)
{
hasWon = true;
break;
}
}

if (hasWon)
wins++;
else
losses++;
}

private void btnShow_Click(object sender, EventArgs e)
{
textBox1.Text = "";
listBox1.Items.Clear();
listBox1.Items.Add(wins + " win" + ((wins != 1) ? "s" : ""));
listBox1.Items.Add(losses + " loss" + ((losses != 1) ? "es" : ""));
}
}
Christiaan Potgieter11y ago
Thank you so many :D
Christiaan Potgieter11y ago
Thank you so many :D
Christiaan Potgieter11y ago
Thank you so many :D