09 October 2013 08:46:27 AM SPRING_ODE2 C++ version Approximate the solution of a spring equation. Write data to a file for use by gnuplot. Created data file "spring_ode2_data.txt". Created command file 'spring_ode2_commands.txt' SPRING_ODE2: Normal end of execution. 09 October 2013 08:46:27 AM