Why this...

[juanirias]

Hello! this are the expansion of F and G series for 2 body problem... Its and integrator for predict the position...
please see:  http://scienceworld.wolfram.com/physics/f-andg-Series.html

I don't know why exploit or overflow...

Regards, JUAN

[engkin]

Hi JUAN,

It seems that the program is working. I attached the results with this post. I'm using Lazarus, so the steps I followed:

1-Expanded the files to c:\problem\
2-Created  a new project: Project - New Project - then selected Simple Program.
3-Copied the contents of bas-f_and_g.pas into the newly created project.
4-Complied with no errors.
5-Ran the executable, again no errors.

[juanirias]

the position cross velocity equal h.
CrossProduct (position,velocity)=h
h is constant vector!

http://en.m.wikibooks.org/wiki/Astrodynamics/Motion_Constants

the text file go fine until the absolute value of the components is greater than 1

[juanirias]

see this :
http://adsabs.harvard.edu/abs/1965AJ.....70..269S