mark_points():
  C++ version
  Plot a damped sine function over a range.
  Mark the first data point green, and the last one red.
  Created data file "mark_points_data.txt".
  Created data file "mark_points_start_data.txt".
  Created data file "mark_points_end_data.txt".
  Created command file "mark_points_commands.txt"

mark_points():
  Normal end of execution.