How To Loop Questions In C#

Question

I Need This Code To Loop 15 Times So It Asks The User 15 Different Questions With New Random Numbers ...

Vulpes · Answer

I don't really know what you're talking about (what's this about a side length?) but you can square the answers easily enough with: for (int i = 0; i { questions[i] = i.ToString(); answers[i] = (i * i).ToString(); }

Antony Fox · Answer

Ok so i have implemented that and got that to work. Now i just need to know how to make the answers the random number * the random number as im creating a square area test. So the answers need to be the side length squared? How would i change the code so the answers are squared rather than the random number?

Vulpes · Answer

Suppose you have: 1. two buttons - btnStart to load the first question and btnSubmit to submit an answer. 2, two textboxes - txtQuestion to display the question and txtAnswer for the user to enter the answer, before pressing btnSubmit. Then the code you'll need for your main form, Form1 say, is as follows: namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } // private fields private string[] questions; private string[] answers; private bool[] alreadyAsked; private Random r = new Random(); private int numCorrect = 0; private int numAsked = 0; private int numQuestion = 0; private void Form1_Load(object sender, EventArgs e) { questions = new string[15]; answers = new string[15]; alreadyAsked = new bool[15]; // populate questions & answers (numbers used for testing) for (int i = 0; i { questions[i] = i.ToString(); answers[i] = i.ToString(); } } private void GetNextQuestion() { while (true) { int num = r.Next(0, 15); if (!alreadyAsked[num]) { alreadyAsked[num] = true; numQuestion = num; txtQuestion.Text = questions[num]; txtAnswer.Focus(); return; } } } private void btnStart_Click(object sender, EventArgs e) { btnStart.Enabled = false; GetNextQuestion(); } private void btnSubmit_Click(object sender, EventArgs e) { string answer = txtAnswer.Text.Trim(); if (answer == "") { MessageBox.Show("You haven't answered it yet!"); txtAnswer.Focus(); return; } if (answer == answers[numQuestion]) { MessageBox.Show ("That's correct!"); numCorrect++; } else { MessageBox.Show("Sorry, that's wrong :("); } numAsked++; txtQuestion.Text = ""; txtAnswer.Text = ""; if (numAsked == 15) { MessageBox.Show(String.Format("You got {0} question(s) correct", numCorrect)); this.Close(); } else { GetNextQuestion(); } } } }

Antony Fox · Answer

No not atm, ive tried implementing what ive been told but because the code i was gien was for Console and im doing it on Windows Forms App im not sure where to put certain bits as within the Windows Forms you have different methods.

Suthish Nair · Answer

Antony, Query Resolved?

Vulpes · Answer

Here's the same code adjusted so that you don't ask the same question more than once: string[] questions = new string[15]; string[] answers = new string[15]; bool[] alreadyAsked = new bool[15]; // populate questions & answers Random r = new Random(); int numCorrect = 0; int numAsked = 0; while (true) { int num = r.Next(0, 15); if (alreadyAsked[num]) continue; alreadyAsked[num] = true; Console.WriteLine(questions[num]); string answer = Console.ReadLine(); if (answer == answers[num]) { Console.WriteLine("That's correct!"); numCorrect++; } else { Console.WriteLine("Sorry, that's wrong :("); } numAsked++; if (numAsked == 15) break; Console.WriteLine(); } Console.WriteLine("You got {0} question(s) correct", numCorrect);

Vulpes · Answer

The code will be something like this: string[] questions = new string[15]; string[] answers = new string[15]; // populate questions & answers Random r = new Random(); int numCorrect = 0; for(int i = 0; i { int num = r.Next(0, 15); Console.WriteLine(questions[num]); string answer = Console.ReadLine(); if (answer == answers[num]) { Console.WriteLine("That's correct!"); numCorrect++; } else { Console.WriteLine("Sorry, that's wrong :("); } Console.WriteLine(); } Console.WriteLine("You got {0} question(s) correct", numCorrect); You didn't say whether you wanted to avoid asking the same question more than once but, if you do, then that's easy to adjust for.

How To Loop Questions In C#

Answers (7)