/* Numerik-I/06S, Aufgabe 09, bearbeitet von ...........
*/
import java.awt.*;
import java.awt.Graphics;
import java.awt.event.*;

class Fenster extends Frame implements WindowListener { //Fenster für Graphikausgabe
  Fenster() {//Konstruktor
    super("Bildausgabe");
    setSize(510,510);
    addWindowListener(this);
  }
  public void windowClosing(WindowEvent e) {//Fenster schließen
    System.exit(0);
  }
  public void windowOpened(WindowEvent e) { }
  public void windowClosed(WindowEvent e) { }
  public void windowActivated(WindowEvent e) { }
  public void windowDeactivated(WindowEvent e) { }
  public void windowIconified(WindowEvent e) { }
  public void windowDeiconified(WindowEvent e) { }
  
  double[] x,ad; // = Speicher Polynom-Koeffizienten

  // Auswertung Polynom an Stelle x:
  static double horner(int n, double z, double[] x, double[] a){//Hornerschema
/* eigene Anweisungen
*/
  }

  public void paint(Graphics g) { // Zeichnet Graphen
    int s0,z0,s1,z1;
    double t;
    g.setColor(Color.black);
    g.drawLine(10,250,490,250); //x-Achse
    s1 = 10;
    z1 = (int) Math.round(250-200*horner(28,-1.0,x,ad));
    g.setColor(Color.red);
    for (int i=1; i<=480; i++) {
      s0 = s1; z0 = z1;
      t = i/240.0-1; //x-Wert Polynomgraph
      s1 = 10+i;    //x-Pos. im Graph
      z1 = (int) Math.round(250-200*horner(28,t,x,ad));
      g.drawLine(s0,z0,s1,z1);
    }
  }
}

class Aufg09 {

  static void divdif(int n, double[] x, double[] a){ //Differenzenschema in a
/* eigene Anweisungen
*/
  }

 public static void main(String args[]) {
    Fenster f = new Fenster(); // neues Graphik-Fenster f
    // Datenwerte:
    int n = 28;
    f.x = new double[n+1];   // für Stützstellen
    f.ad = new double[n+1]; // für Datenwerte
/* x, und y -Daten in f.x, f.ad speichern
*/
    divdif(n,f.x,f.ad);

    f.setVisible(true); //ruft f.paint auf
    //f.repaint();
  }
}