LIFE_SERIAL
John Conway's Game of Life

LIFE_SERIAL is a FORTRAN77 program which computes a few steps of the evolution of John Conway's Game of Life, intended as a starting point for implementing a parallel version.

Licensing:

The computer code and data files made available on this web page are distributed under the GNU LGPL license.

Languages:

LIFE_SERIAL is available in a C version and a C++ version and a FORTRAN77 version and a FORTRAN90 version and a MATLAB version.

Related Data and Programs:

BT_SERIAL, a FORTRAN77 program which a serial version of the NAS Block Tridiagonal (BT) Parallel Benchmark.

CG_SERIAL, a FORTRAN77 program which a serial version of the NAS Conjugate Gradient (CG) Parallel Benchmark.

CIRCLE_GRID_DISPLAY, a MATLAB program which reads a matrix of integers, and draws a corresponding grid of circles filled with color.

EP_SERIAL, a FORTRAN77 program which a serial version of the NAS Embarassingly Parallel (EP) Parallel Benchmark.

FFT_SERIAL, a FORTRAN77 program which demonstrates the computation of a Fast Fourier Transform (FFT), and is intended as a starting point for implementing a parallel version.

FIRE_SERIAL, a FORTRAN77 program which simulates a forest fire over a rectangular array of trees, starting at a single random location. It is intended as a starting point for the development of a parallel version.

MG_SERIAL, a FORTRAN77 program which a serial version of the NAS MultiGrid (MG) Parallel Benchmark.

MXM_SERIAL, a FORTRAN77 program which sets up a matrix multiplication problem A=B*C, intended as a starting point for implementing a parallel version.

POISSON_SERIAL, a FORTRAN77 program which computes an approximate solution to the Poisson equation in a rectangle, intended as the starting point for the creation of a parallel version.

PRIME_SERIAL, a FORTRAN77 program which counts the number of primes between 1 and N, intended as a starting point for the creation of a parallel version.

QUAD_SERIAL, a FORTRAN77 program which approximates an integral using a quadrature rule, and is intended as a starting point for parallelization exercises.

QUAD2D_SERIAL, a FORTRAN77 program which approximates an integral over a 2D region using a product quadrature rule, and is intended as a starting point for parallelization exercises.

SEARCH_SERIAL, a FORTRAN77 program which searches integers between A and B for a value J such that F(J) = C, intended as a starting point for the creation of a parallel version.

SUBSET_SUM_SERIAL, a FORTRAN77 program which seeks solutions of the subset sum problem, in which it is desired to find a subset of a set of integers which has a given sum; this version of the program is intended as a starting point for a parallel approach.

Reference:

1. Martin Gardner,
   Mathematical Games: The Fantastic Combinations of John Conway's new solitaire game "Life",
   Scientific American,
   Volume 223, Number 4, October 1970, pages 120-123.
   

Source Code:

• life_serial.f, the source code.
• life_serial.sh, BASH commands to compile the source code.

Examples and Tests:

Executing the program produces a series of text files containing 0's and 1's, to indicate the current state of the game:

• life_000.txt
• life_000.png, a color grid created by circle_grid_display().
• life_001.txt
• life_001.png, a color grid created by circle_grid_display().
• life_002.txt
• life_003.txt
• life_004.txt
• life_005.txt
• life_006.txt
• life_007.txt
• life_008.txt
• life_009.txt
• life_010.txt

List of Routines:

• MAIN is the main program for LIFE_SERIAL.
• FILENAME_INC increments a partially numeric file name.
• LIFE_INIT initializes the life grid.
• LIFE_UPDATE updates a Life grid.
• LIFE_WRITE writes a grid to a file.
• R8_UNIFORM_01 returns a pseudorandom R8 scaled to [0,1].
• S_LEN_TRIM returns the length of a string to the last nonblank.
• TIMESTAMP prints the current YMDHMS date as a time stamp.

You can go up one level to the FORTRAN77 source codes.