Fortran

This repsoitory contains simple programs written as I learn FORTRAN.

name	description	command tested	file dependencies	files output
`hello.f`	hello world	`write` `sleep`
`fundem.f`	fundamental	`read` `function`
`ar.f`	array	`subroutine`	`f.f` `f2.f`
`global.f`	global variable	`include`	`araydim.inc`
`sys.f`	system	`system`
`subs.f`	subroutines	`call`	`f.f` `f2.f`
`globsubs.f`	global variable subroutine	`include` `call`	`araydim.inc`
`test_abs.f`	absolute value	`abs` `real`
`sign.f`	sign control	`ss` `sp`
`io.f`	input/output	`inquire` `open`		`svp.out`
`timedate.f`	date and time	`date_and_time`
`pause.f`	pause	`pause`
`test_system_clock.f`	system clock	`system_clock`	`format.f` `set_format.f`
`make_svp.f`	make svp	`system_clock` `srand` `rand`		`svp.in`
`collatz.f`	Collatz sequence		`format.f` `set_format.f`
`collatz_loop.f`	Collatz delay records		`format.f` `set_format.f`	`collatz.txt`
`collatz_glide.f`	Collatz glide calculation		`format.f` `set_format.f`
`huge.f`	largest integer	`kind` `huge`	`format.f` `set_format.f`
`interrupt.f`	catch interrupt signal	`common` `signal`		`state`
`extrema.f`	extrema	`huge` `tiny`
`getunit_test.f`	newunit replacement	`inquire`	`getunit.f`
`fmt.f`	comma format		`format.f` `set_format.f`
`timer.f`	timer	`system_clock` `common` `signal`	`set_format.f`
`units.f`	unit conversions	`selected_real_kind`
`basel.f`	basel problem
`test_pi.f`	pi	`atan`
`ask.f`	read to logical	`index`
`borwein.f`	pi iteration
`leibniz.f`	pi iteration
`wallis.f`	pi iteration

name	description	command tested
`f2.f`		`dimension`
`f.f`		`dimension`
`format.f`	format numerical input to string

name	description
`getunit.f`	newunit replacement

name	description
`araydim.inc`	array dimension
`set_format.f`	set integer size and display precision

Installation

Requies a compiler for Fortran, such as GNU Fortran. Use the following commands to install GFortran, etc, on Linux.

sudo apt update && sudo apt -y upgrade
sudo apt -y install git
sudo apt -y install make
sudo apt -y install gfortran

These commands have been collected in the script install_packages.sh.

Check out the folder from the repository with one of the following commands.

svn co https://github.com/jonlighthall/fortran.git/trunk/ ./fortran (SVN)

git clone https://github.com/jonlighthall/fortran (Git HTTPS)

git clone git@github.com:jonlighthall/fortran.git (Git SSH)

Compile the source files and create executables with commands such as the following.

gfortran -o hello.exe hello.f

Alternatively, these commands can be executed by using the make command.

The compiled executables can be run using commands such as the following.

./hello.exe

Groups of executeables can be run in sequnece with the following commands.

make run to run programs which do not require user input.

make run_man to run programs which require user input.

make run_int to run programs which require an interrupt signal to terminate.