// Quadratic3.java
//
// Outputs the value of a*x^2 + b*x + c
// where a, b, c, and x have been input
// by the user.
//
// Uses console input

import javax.swing.JOptionPane;

public class Quadratic3
{
   public static void main(String[] args)
   {
      double a = Double.parseDouble(
                         JOptionPane.showInputDialog("Enter a:"));
      double b = Double.parseDouble(
                         JOptionPane.showInputDialog("Enter b:"));
      double c = Double.parseDouble(
                         JOptionPane.showInputDialog("Enter c:"));
      double x = Double.parseDouble(
                         JOptionPane.showInputDialog("Enter x:"));

      System.out.println("Given x = " + x + ", "
                         + a + "*x^2" + " + " + b + "*x" + " + " + c
                         + " = " + quadratic(a, b, c, x) + ".");

      System.exit(0);
   }

   public static double quadratic(double a, double b, double c, double x)
   {
      return a*x*x + b*x + c;
   }
}