#include "library.h"

double function_one(double x)
{ return 300 + 200*sin(x/100) + 50*cos(x/20); }

double function_two(double x)
{ return 300 - 150*sin(x/150) + 40*cos(x/30); }

void tabulate(double f(double x), double from, double to)
{ if (from <= to)
  { print("tabulate from=");
    print(from);
    print(", to=");
    print(to);
    new_line();
    const double x = from;
    const double y = f(x);
    if (x == 0)
      move_to(x, 600 - y);
    else
      draw_to(x, 600 - y);
    print("When x = ");
    print(x);
    print(", y = ");
    print(y);
    new_line();
    tabulate(f, from+1, to); } }

void main()
{ make_window(600, 600);
  set_pen_width(2);
  set_pen_color(color::blue);
  tabulate(function_one, 0, 600);
  set_pen_color(color::red);
  tabulate(function_two, 0, 600); }