import java.text.DecimalFormat;
import java.util.Random;

public class MathClass {
	// creating the variables
	private int x;
	private int y;
	private int OperandNumber;
	private static double CorrectAnswer;
	private int Maximum;
	private int Minimum;

	public MathClass(int Maximum, int Minimum)
	{
		this.Maximum = Maximum;
		this.Minimum = Minimum; // initialize
	}
	public void RandomNumbers() {
		// making the number generator
		Random generator1 = new Random();
		x = generator1.nextInt(Maximum) + Minimum; // making sure the numbers are within the min and max
		y = generator1.nextInt(Maximum) + Minimum;
	}
	public void RandomOperand() {
		// making the operand generator
		Random generator2 = new Random();
		OperandNumber = generator2.nextInt(4);
	}
	public String Question(){
		if (OperandNumber == 0){
		RandomNumbers();
		CorrectAnswer =(double) x + y;
		return "What is " + x + "+" + y + "?"; // addition
		}

		else if (OperandNumber == 1){
		RandomNumbers();
		CorrectAnswer = (double)x - y;
		return "What is " + x + "-" + y + "?"; // subtraction
		}

		else if (OperandNumber == 2){
		RandomNumbers();
		CorrectAnswer = (double)x * y;
		return "What is " + x + "*" + y + "?"; // multiplication
		}

		else if (OperandNumber == 3){
		RandomNumbers();
		CorrectAnswer = (double)x / y;
		return "What is " + x + "/" + y + "?"; // division
		}

		else {
		return "The program isn't generating numbers!";
		}
	}

	Problem3 myProblem3 = new Problem3(CorrectAnswer); // pass the answer to Problem3

	public static String IncorrectAnswer() {
		DecimalFormat fmt = new DecimalFormat ("0.###");
		return "That is incorrect. The correct answer is: " + fmt.format(CorrectAnswer);
	}

	public static String CorrectAnswer() {
		DecimalFormat fmt = new DecimalFormat ("0.###");
		return "That is correct!";
	}
}