mersenne_inline.c and mersenne.h
These are an implementation of the Twisted Mersenne random number generator. You need these for almost all of the other programs

random_genrate.c
Just generates and prints random numbers. Uses the Mersenne generator from above.

gaussian_ran.c
Implements the Box-Muller method for generating Gaussian random numbers.

grnd_generate.c
Prints Gaussian random numbers.

mc_integrate.c
Does a simple Monte Carlo integration.

ising_sim.c
2-d Ising model heat bath update program. Needs mersenne.h and mersenne_inline.c.

errors.c and cmdline.c
A general-purpose program for analysing errors with autocorrelations of simulation data written in a file. Needs both errors.c and cmdline.c above. Instructions for use are written in file errors.c. Compile (in unix/linux) with
cc -o errors errors.c cmdline.c -lm

ions.c
Monte Carlo program for interacting Coulomb particles, "ions". Requires mersenne_inline.c, mersenne.h, gaussian_ran.c and cmdline.c. This can use grace-plotting program for animations, if available (requires X11). This is included if GRACE is defined in ions.c. Compile with
cc -O2 -o ions ions.c gaussian_ran.c mersenne_inline.c cmdline.c -lm -lgrace_np
where the last library (-lgrace_np) is used only if grace support is compiled in.

xisingdemo.c
X-windows demo program for 2d Ising model. Needs mersenne.h and mersenne_inline.c This is modified from the "xtoys" programs of Michael Creutz, Brookhaven, http://thy.phy.bnl.gov/www/xtoys/xtoys.html