#include "library.h"

double func(const double x)
{ const double w = x*x*x/1000000.0;
  return (cos(w)/(x+1.0))*10000.0+250.0; }

double other(const double x)
{ const double w = x*x/10000.0;
  return (sin(w)/(x+0.5))*10000.0+250.0; }

void plot(double f(const double x), const double x0, const double x1)
{ if (x1-x0 < 1.0)
  { const double y0 = f(x0), y1 = f(x1);
    move_to(x0, y0);
    draw_to(x1, y1); }
  else
  { const double xm = (x0+x1)/2;
    plot(f, x0, xm);
    plot(f, xm, x1); } }

void main()
{ make_window(500, 500);
  set_pen_width(3);
  set_pen_color(color::blue);
  plot(func, 0.0, 500.0);
  set_pen_color(color::red);
  plot(other, 0.0, 500.0); }