March 29 2023   8:15:15.296 AM
 
md():
  FORTRAN90 version
  A molecular dynamics program.
 
  Enter ND, the spatial dimension (2 or 3 ):
 
  Enter NP, the number of particles (500, for instance):
 
  Enter STEP_NUM, the number of time steps (500, for instance):
 
  ND, the spatial dimension, is        3
  NP, the number of particles in the simulation is     1000
  STEP_NUM, the number of time steps, is      400
  DT, the size of each time step, is   0.100000E-03
 
  Initializing positions, velocities, and accelerations.
 
  Computing initial forces and energies.
 
  At each step, we report the potential and kinetic energies.
  The sum of these energies should be a constant.
  As an accuracy check, we also print the relative error
  in the total energy.
 
      Step      Potential       Kinetic        (P+K-E0)/E0
                Energy P        Energy K       Relative Energy Error
 
         0     498050.         0.00000         0.00000    
        40     498050.        0.550200E-01    0.184544E-10
        80     498050.        0.228761        0.170776E-10
       120     498049.        0.521378        0.132794E-10
       160     498049.        0.932993        0.578582E-11
       200     498048.         1.46378       -0.663431E-11
       240     498048.         2.11395       -0.252361E-10
       280     498047.         2.88378       -0.512450E-10
       320     498046.         3.77360       -0.859474E-10
       360     498045.         4.78377       -0.130489E-09
       400     498044.         5.91471       -0.186107E-09
 
  Elapsed cpu time for main computation:
     12.2767     seconds
 
MD:
  Normal end of execution.
 
March 29 2023   8:15:27.610 AM