import jan.*;
import java.awt.*;

class SuperPlotter {

  SuperPlotter(Biotope b) {
    b.setAlignment(b.right);
    b.goFromTo(-100,0,100,0);
    b.dropArrow();
    b.goFromTo(0,100,0,-100);
    b.dropArrow();
  }

  public void draw (Biotope b) {
    int xPixel,yPixel;
    double x,y;

    b.setColor(b.tail, b.transparent);
    b.goTo(-100,0);
  
    for (xPixel=-100;xPixel<=100;xPixel++) {
      x=xPixel;
      y=f(x);
      y=scale(y);
      yPixel=(int)(-y);
      b.goTo(xPixel,yPixel);
      b.setColor(b.tail, Color.red);}
  }

  public double f (double x) {
    return 0.0;}

  public double scale (double y) {
    return 0.0;}

}

class CubePlotter extends SuperPlotter {

  CubePlotter(Biotope b) {
    super(b);
  }

  public double f (double x) {
    return x*x*x;
  }

  public double scale (double y) {
    return y/10000.0 ;
  }
}

class SinePlotter extends SuperPlotter {

  SinePlotter(Biotope b) {
    super(b);
  }

  public double f (double x) {
    x=Math.PI+x/Math.PI;
    return Math.sin(x);
  }

  public double scale (double y) {
    return y*100.0;
  }
}

class TanPlotter extends SuperPlotter {

  TanPlotter(Biotope b) {
    super(b);
  }

  public double f (double x) {
	  x=x*Math.PI/201;   // go close to PI/2
    return Math.tan(x);
  }

  public double scale (double y) {
    return y/1.28;       // 128=tan(PI/2.01)
  }
}

class ExpPlotter extends SuperPlotter {

  ExpPlotter(Biotope b) {
    super(b);
  }

  public double f (double x) {
	  x=x*0.046;       
    return Math.exp(x);
  }

  public double scale (double y) {
    return y; //
  }
}


public class A3P1 extends Biotope implements Executable {

  String func;
  CubePlotter c;
  SinePlotter s;
  TanPlotter t;
  ExpPlotter e;



  public static void main (String arguments []) {main ("A3P1", "mode=input,draw");}

  public void initialize () {
    addDataLine ("c");
	message("c - cube");
	message("s - sine");
	message("t - tan");
	message("e - exp");



  }

  public void execute () {
    

    func=readString(1);
    initGecko();
    
    c=new CubePlotter(this);
    s=new SinePlotter(this);
    t=new TanPlotter(this);
    e=new ExpPlotter(this);

    switch (func.charAt(0)) {
    case 'c' : c.draw(this);
      break;
    case 's' : s.draw(this);
      break;
    case 't' : t.draw(this);
      break;
    case 'e' : e.draw(this);
      break;
    default : message("Wrong letter");
    }




  }



}