Thread: Default constructor generating random questions

Need to create a default constructor that generates a random question, addition or subtraction. And when adding the numbers must be random from 0-12 and when subtracting the first number must be from 6-12, while the second is less than the first number. Here's my progress as of now:

package project4;
 
public class Question {
	private int num1;
	private int num2;
	private char operand;
 
	public Question()
	{
		operand = '+';
		num1 = (int)(Math.random())*12;
		num2 = (int)(Math.random())*12;
 
 
 
 
		operand = '-';
		num1 = ((int)(Math.random())*12+6);
		num2 = (int)(Math.random()) << num1;
 
			}
 
 
	public String toString()
	{
		String str = new String(num1 + " " + operand + " " + num2);
		return str;
	}
 
 
}

Also, when called via the toString method I get: 6-0. Every time I run it.

I am actually calling my constructor and the toString method in an another application class not in the programmer defined class.

 
package project4;
 
public class Project4App
 {
	public static void main(String[] args)
{
	Question question1 = new Question();
	System.out.println(question1.toString());
 
 
}
     }

I see where the values are given in, it takes the num1 and num2 values declared in the constructor, what I'm not understanding is why I'm getting 6-0 as my only values and better yet, how do I ensure that my code will produce random equations instead of just a subtraction one.

Okay, the thing is I'm assigning the instance variables in the constructor and the constructor is automatically assigning the value of num1 as 6 and num2 as 0. Just browse my initial code to tell me what I may be missing, because I've already used the .random method. Also, I created a method to call the instance variables themselves, and it didn't work out.

Ok, I altered the Question class I posted, it should be able to compile without any problems. If not I'll paste the entire text. And I attempted to see what was wrong, the only problem I see right now is that my instance variables' values are being replaced at the end of the constructor with the numbers 6 and 0, instead of random numbers.

Okay I fixed the problem with the variables. So far I have created the equation to add the two numbers, not subtraction. Also, I don't understand how I can tell my program to choose a random question.

 
	public Question()
	{
		operand = '+';
		num1 = (int)(Math.random()*12);
		num2 = (int)(Math.random()*12);
	}

That's just the top part after I changed it and it now gives me a random value for num1 + a random value for num2

We aren't allowed to use arrays, I was thinking maybe a for loop but I don't how I'd go about that.

We can use if/else statements, but how would I go about doing that in the constructor?

--- Update ---

Just so you know, I've only been programming for 2 months, so feel free to elaborate as much as you possibly can, lol.