main()
{
  Screen picture;
  Rect myrect;
  ifstream infile;
  int a, b, c, d;
  char filename[50];

  init_screen(picture);

  cout << "Enter filename> ";
  cin.getline(filename, 50);
  infile.open(filename);
  if (infile.fail()) {
	cout << "could not open file...";
	exit(0);
  }

  infile >> a;
  while (!infile.eof()) {
	infile >> b >> c >> d;
	make_rectangle(a, b, c, d, myrect);
	insert_rectangle(picture, myrect);
	infile >> a;
  }

  clrscr();
  draw_screen(picture);
  cout << "Area is = " << compute_area(picture);

  return(0);
}