[zell_ffhut]

Hi Guys

I'm just learning Java, and i've been plugging away with a exercise in a book, but im a bit stuck!

I need to make a program that asks a user a question, takes there answer, and then checks it to make sure its correct. Here's what i have so far.

This is the main Class

/*
 * QuestionMain.java
 *
 * Created on 09 February 2006, 17:18
 */

/**
 *
 * @author 04127263
 */

import java.io.*;

public class QuestionMain 
{
	static private BufferedReader in =
	new BufferedReader(new InputStreamReader(System.in));
	
	public static void main(String[] args) 
	{
		String question;
	  
		Questions q1 = new Questions(3);
		q1.setAnswer(0, "The method does not return a value.");
		q1.setAnswer(1, "The method is empty.");
		q1.setAnswer(2, "The method doesn't do anything.");
		// TODO code application logic here
		question = "What does 'void' mean when it precedes the name of a method?";
		System.out.println(questions(1));
		System.out.println(questions(2));
		System.out.println(questions(3));
		System.out.println("Please Choose 0, 1 or 2");
	}
	
}

This is a Class

/*
 * Questions.java
 *
 * Created on 09 February 2006, 15:22
 */

/**
 *
 * Christopher Murray 04127263
 */
public class Questions 
{
	private String questionText;
	private String [] answers;
	String answerText;
	private int correctAnswer;
	
	//Creates an Instance of the class Questions
	public Questions(int noAnswers)
	{   
		answers=new String[noAnswers];
	}	   
   
	//Gets the Question from the Main Class
	public void setQuestion(String qText)
	{
		questionText = qText;
	} 
	
	//This sets the answer numbers for the answer
	public void setAnswer(int answerNo, String answerText)
	{
		answers[answerNo]=answerText;
	}
	
	//Gets the number for the correct answer
	public void setCorrectAnswer(int answerNo)
	{
		correctAnswer = answerNo;
	}
	
	//Tests to check for correct answer
	public boolean qAnswerCorrect(int answer)
	{
	   if (answer == correctAnswer)
		 return true;
	   else
		 return false;
	}
	
}

The main problem i having currently is that the Main Class calls the error -

Can not find symbol -
symbol : method questions(int)
location: class QuestionMain
System.out.println(questions(1));

Any help would be fantastic.
Thanks

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You're going to need to make some way that you can retreive values from your Questions class, like a get method.

public String get(int index) {
	return answers[index];
}

Then, you can change the following:

System.out.println(questions(1));
System.out.println(questions(2));
System.out.println(questions(3));

to

System.out.println(questions.get(0));
System.out.println(questions.get(1));
System.out.println(questions.get(2));

Edited by destin, 15 February 2006 - 05:23 PM.

[destin]

You're going to need to make some way that you can retreive values from your Questions class, like a get method.

public String get(int index) {
	return answers[index];
}

Then, you can change the following:

System.out.println(questions(1));
System.out.println(questions(2));
System.out.println(questions(3));

to

System.out.println(questions.get(0));
System.out.println(questions.get(1));
System.out.println(questions.get(2));

Edited by destin, 15 February 2006 - 05:23 PM.

[zell_ffhut]

Thanks for your input!

I've added this method to the questions.java class

	//Returns the Value of questionText
	public String getQuestion(int answerNo)
	{
		return answers[answerNo];   
	}

and this code to the main class

		System.out.println(question.getQuestion(1));
		System.out.println(question.getQuestion(2));
		System.out.println(question.getQuestion(3));

still getting errors

symbol : method getQuestion(int)
location: class java.lang.String
System.out.println(question.getQuestion(1));

Any ideas?

[destin]

Ah, sorry. If you look back in your first post, you'll notice that question is a String object, not a Questions object. You want to use q1.getQuestion(int).

Also, make sure that you use 0, 1, and 2 instead of 1, 2, and 3 or an ArrayIndexOutOfBoundsException will be thrown.

[zell_ffhut]

Thank you

Getting somwhere now. The program runs with no errors. But it dosen't do a whole lot!

[zell_ffhut]

I think im nearly done now, just think i need to compare the users input, with the correct answer. Can anyone help me on how to do this please?

/*
 * QuestionMain.java
 *
 * Created on 09 February 2006, 17:18
 */

/**
 *
 * @author 04127263
 */

import java.io.*;

public class QuestionMain 
{
	static private BufferedReader in =
	new BufferedReader(new InputStreamReader(System.in));
	
	public static void main(String[] args) 
	{
		String question;
		int number;
	  
		Questions q1 = new Questions(3);
		q1.setAnswer(0, "The method does not return a value.");
		q1.setAnswer(1, "The method is empty.");
		q1.setAnswer(2, "The method doesn't do anything.");
		
		q1.setCorrectAnswer(0);
		
		// TODO code application logic here
		question = "What does 'void' mean when it precedes the name of a method?";
		System.out.println(q1.getQuestion(0));
		System.out.println(q1.getQuestion(1));
		System.out.println(q1.getQuestion(2));
		System.out.println("Please Choose 0, 1 or 2");
		
		number = Text.ReadInt(in);
		
	   
	}
	
}

/*
 * Questions.java
 *
 * Created on 09 February 2006, 15:22
 */

/**
 *
 * Christopher Murray 04127263
 */
public class Questions 
{
	private String questionText;
	private String [] answers;
	private int correctAnswer;
	
	//Creates an Instance of the class Questions
	public Questions(int noAnswers)
	{   
		answers=new String[noAnswers];
	}	   
   
	//Gets the Question from the Main Class
	public void setQuestion(String qText)
	{
		questionText = qText;
	} 
	
	//This sets the answer numbers for the answer
	public void setAnswer(int answerNo, String answerText)
	{
		answers[answerNo]=answerText;
	}
	
	//Gets the number for the correct answer
	public void setCorrectAnswer(int answerNo)
	{
		correctAnswer = answerNo;
	}
	
	//Tests to check for correct answer
	public boolean qAnswerCorrect(int answer)
	{
	   if (answer == correctAnswer)
		 return true;
	   else
		 return false;
	}
	
	//Returns the Value of questionText
	public String getQuestion(int answerNo)
	{
		return answers[answerNo];   
	}
	
	
	//Returns the Value of answerText
	public String getAnswers(String answerText)
	{
		int count;
		
		for(count = 0; count < answers.length; count++)
		{
			answerText = answerText + count + " " + answers[count];
		}
		answerText = answerText + "\n";
		return answerText;
	}
	 
}

[destin]

This it the easy part. Look at your Questions class. You have a qAnswerCorrect(int) method that will check if an answer is correct. So you can do something like:

if (q1.qAnswerCorrect(number)) {
	System.out.println("Correct!");
} else {
	System.out.println("Sorry! Incorrect!");
}

Hope this helps.