Quadratic Formular Solver (Non-GUI)

I just made this better, because I have used it like 10,000 times for math class. . I hope you guys learn something.

Code:

package suf;

import java.util.*;

public class QuadraticSolver 
{
	static boolean useAgain = true;
	static Scanner s = new Scanner(System.in);
	static boolean validInput = true;

	public static void main(String[] args)
	{
		System.out.println("Welcome to SuF's Quadtratic Formula Solver!");
		System.out.println("Remeber your negivtive signs!");

		while (useAgain) 
		{
			quadraticFormula();
			System.out.print("Would you like to use this program again? ('Y' or 'N'):");
			do 
			{
				String answer = s.next();
				validInput = true;
				if (answer.equalsIgnoreCase("N"))
					useAgain = false;
				else if (answer.equalsIgnoreCase("Y"))
					;
				else 
				{
					validInput = false;
					System.out.println("Please Enter 'Y' or 'N'");
				}

			} while (!validInput);

		}
		System.out.println("\n" + "Thank you for using SuF's Quadtratic Formula Solver!");
	}

	public static void quadraticFormula() 
	{
		double a = getInput("Enter A:");
		double b = getInput("Enter B:");
		double c = getInput("Enter C:");
		double d = Math.sqrt((b * b) - (4 * a * c));
		System.out.println("Answer 1: " + (-b + d) / (2 * a) + "\n" + "Answer 2: " + (-b - d) / (2 * a));
	}

	public static double getInput(String output) 
	{
		while (true) 
		{
			try 
			{
			System.out.print(output);
			return s.nextDouble();
			} 
			catch (InputMismatchException e) 
			{
				s.next();
			}
		}

	}

}

 

I have a QF program on my TI-84+ Silver Edition.

 

I just have chemistry test answers on mine.

 

Best way to hide formulas on a calc is through pics ^^ (2nd+prog.. u can figure it out from there).. teachers usually only check for programs and its pretty fast to load a pic ^^

 

Our teachers don't check our calcs for anything... lul

 

its kinda sad, there are calculators with dictionary words isnide them

 

And? My calculator has Doom on it.

 

Well, thats fucking unfair!