Need LAAMPS code

I am a new user of lammps. I have already taken lammps 64 bit and succeeded to run in my laptop. I have run a file given in lammps stable. I want to use laamps simulation for research purposes.For this reason I want to understand the full code. I have the lammps stable files and examples including the command manual. I want the full code to understand it want to make own lammps. I need help to get the full code.
Best regards

I am a new user of lammps. I have already taken lammps 64 bit and succeeded
to run in my laptop. I have run a file given in lammps stable. I want to use
laamps simulation for research purposes.For this reason I want to understand
the full code. I have the lammps stable files and examples including the
command manual. I want the full code to understand it want to make own
lammps. I need help to get the full code.

you can get it here: http://lammps.sandia.gov/download.html
or here: http://git.lammps.org/git/
or here: https://github.com/lammps/lammps/
or here: https://bitbucket.org/akohlmey/lammps

the full LAMMPS distribution currently has over half a million lines
of code, so you have some serious reading ahead of you.

axel.