14 September 2021  10:27:50.585 AM
 
RK4_TEST
  FORTRAN90 version.
  Test RK4.
 
rk4_predator_test
  Use rk4() to solve the predator prey ODE.

predator_phase_plot:
  Write command and data files that can be used
  by gnuplot for a predator-prey phase plot.
 
  predator_phase_plot: data stored in "predator_data.txt".
  predator_phase_plot: plot commands stored in "predator_commands.txt".
 
RK4_TEST
  Normal end of execution.
 
14 September 2021  10:27:50.587 AM