Starlab version 4.4.1
    program created on Apr 27 2005 at 22:56:22
    source file     /home/steve/starlab/src/node/dyn/evolve/leapfrog.C

leapfrog:  Leapfrog integrator for flat N-body dyn systems.

Options:   -a    specify timestep [0.02]
           -c    add a comment to the output snapshot [false]
           -d    specify log output time interval [0.25]
           -D    specify snapshot output time interval [none]
           -e    specify softening parameter [0.05]
           -q    echo parameters to cerr [true]
           -t    specify time span of integration [1]
           -x    terminate precisely at specified end time [no]