/*
   This version is more generally useful, because it can
   plot any function. It uses the strange but simple idea
   of giving one function as a parameter to another.
*/

#include "library.h"

double f(double x)
{ const double A = x*x*x/1e6;
  return cos(A)*1e4/(x+1) + 250; }

double g(double x)
{ const double A = x*x/1e4;
  return sin(A)*1e4/(x+1) + 250; }

void formula_plot_rest(int A, int B, double function(double x))
{ const int x = A;
  const int y = function(x);
  draw_to(x, y);    
  if (A < B)
    formula_plot_rest(A+1, B, function); }

void formula_plot(int A, int B, double function(double x))
{ const int x = A;
  const int y = function(x);
  move_to(x, y);
  if (A < B)
    formula_plot_rest(A+1, B, function); }

void main()
{ make_window(500, 500);
  set_pen_color(color::blue);
  formula_plot(100, 500, f);
  set_pen_color(color::red);
  formula_plot(100, 500, g); }