#include "library.h"

int factorial(int n)
{ if (n <= 0)
    return 1;
  return n * factorial(n - 1); }

double f(double x)
{ const double u = x/50;
  const double v = u - pow(u, 3)/factorial(3) + pow(u, 5)/factorial(5) - pow(u, 7)/factorial(7)
                     + pow(u, 9)/factorial(9) - pow(u, 11)/factorial(11);
  return  350 + 250 * v; }

double g(double x)
{ return 350 + 250 * sin(x/50); }

void tabulate(int N, int Last, double thefunction(double))
{ if (N <= Last)
  { const double y = thefunction(N);
    print("N = ");
    print(N);
    print(", y = ");
    print(y);
    new_line();
    draw_to((double)N, y);
    tabulate(N + 1, Last, thefunction); } }

void main()
{ make_window(700, 700);
  set_pen_width(2);
  move_to(0.0, f(0));
  tabulate(0, 700, f);
  set_pen_color(color::red);
  move_to(0.0, g(0));
  tabulate(0, 700, g); }