Fortran Programming Tutorials (Revised) : 009 : Geany Features + Parameter keyword Video Lecture | Introduction to Fortran Programming (Basic Level) - Database Management

hello guys my name is Herman welcome to
my channel this series is a series of
tutorials on photon programming now
until the last lecture I mean the last
video we were looking at how to write
programs and code NOx
now the problem is as mentioned I stated
earlier the core Blox main will not
allow certain certain compiler options
that that that does not get that that is
actually required for processing and
compiling and executing with certain
sort of Fortran files in reality in for
real-time applications so so instead we
will be starting this program instead of
instead of code blocks into genie and
for the name for the few tutorials we'll
be using the compile and build options
of genie to work with it when after some
time we will do the entire process of
genie using the terminal that is
available in Genie now Genie is just
like an omelette now head of programming
an IDE and I bet it's lighter and also
have speeches too in how a terminal a
scribble pad a scratch board message
message block compilers that compare
block and a status by the status
dashboard like this and all you know
it's and you know to pick any editor you
guys like I don't it whichever that
makes you you know which others
comfortable for you guys doesn't matter
okay I prefer genie for because I found
it really nice and useful it's your
option okay today we are going to start
okay I already opened a program called
the squadron f95 because this program we
will finding the let will be finding the
length length I mean the distance of a
certain point from the from the origin
and if possible the what does the angle
between that line and the line
connecting the point the lines are in
the point and the origin okay
so let me start with it by the way the
syntax is the syntax coloring might be
different from core Blox genie so you
guys is you guy says
can all of that okay well let's start
program to find the length and angle of
line connecting the given given point
and the origin in X Y plane okay
also we will find the quadrant in which
you find the quadrant of the point we
find the quadrant at the point okay now
let's start our program program quadrant
and program this is one of the features
I like about Jeannie guys a few guys
notice I did I just typed half but it
gives me author compilation features and
all to finish all this and before ERISA
Jeannie Jeannie I just guys like to make
her feel well and tell you guys to make
a few Corrections first of one of them
is that go to the Preferences option and
see Fortran is a little picky with tab
tab integrations using tabs so what you
do is then go to the edit your editor in
the intend Asian's set your set it tab
which to be for and make sure the tabs
are actually filled with spaces okay and
click up click apply
make sure that being done properly and
then in the completions part of it make
sure that this autocomplete symbols
automatic line cannulation of month
automatic our nation of multi lines and
all the stuff all these are applied
click OK and then whether I write the
document sure that your line breaking
option is open so that watch if you guys
start
getting something given point you guys
notice what happened automatically even
we thought do you say the the program
just where the editor just pushed us to
the next line okay the racer there's a
reason why you see this line over here
if when you try to print a program on a
piece of paper beyond this line the
whatever you type may not get printed
they don't get printed properly so what
I do is that well you try to write a
program just have to align them in
multiple lines like this so that's the
reason why okay now now we're ready now
we're ready without any further ado
we'll start implicit none okay
we need real two values for it let them
let for the coordinates X comma Y X come
away and then I need I need the value of
pi' because I have to find the angle of
the I have to find the angle of this of
this point so I mean I may need that I
may need the value of pi so but this pi
has to be a constant meaning if I
declare a variable with of a certain
value PI a certain value and that value
has to remain as it is throughout the
throughout the program for that to
happen is this attribute callers
parameter Y this parameter does is that
it makes sure that the value stored to
that remains as it is now pi is a
parameter and if you want to write the
value you can decide write the value
make 3.14159 and so on but for but 149
pi digits of accuracy but there's
another way instead of this this is
other we call aren't we using
in the intrinsic intrinsic ignorance
ignominy function self for instance by
can be written as 4 into 8 and here time
of one you guys noticed tan tan tan of
45 degrees or time of pi by 4 degree
fiber for radiance is actually one so
the tan tan of pi by 4 or tan of 40
degrees is 1 so there is the arc tan or
the inverse tan of 1 is actually PI by 4
so if I just multiply that by 4 you get
you get PI RS as an as an alternative
you can also try to into a sine of 1
this is also possible you know 2 into
cos of 0 sorry a cos of 0 but I but many
people prefer the tan statement because
this is a little more accurate in my
calculation that's what I heard anyway
you can use these are also into your
consideration so with this being said if
I were to change the value of pi to know
6 somewhere in the program ok if I were
to compile this now the compiler keys
are very easy here which if it is
compiling where to prepare you produce
all the object files and explain you
guys in a minute we'll see you guys what
object files are in a few tutor is later
ok then maybe we'll the comma build it
you get the executable and then when you
type execute to run the program
ok ok now for those the keyboard keys
are simple F and F 8 f 9 and F I so if I
just print F 9 f8 I will compile ok it
just throws me in error stating that see
the I have declared this to be declare
this value to be I declared a value here
but
into show I mean that this Aten must be
real complex that doesn't matter we'll
fix this up here fixes issue it shows
another one say that the symbol pi at
one as it has no implicit type there's
no implicit type okay let me let's fix
this out I think this should be 1.0 to
make sure that it's a double value if
you just run this this error goes away
this error goes away because you have 2
pi you cannot pass the integers inside
this a time function you have to pass
only one real number so one point 0 0 by
default real number but here you get an
error here why because you're fixed pi
is a constant but you're trying to
modify the value of pi here so it won't
accept
so the because of that you you get up an
error so support so that's that's an
example of you know that's an example of
the parameter value or not okay this
video is getting a little too longer in
a few in another 2 to 3 videos will
complete this program and in this
process I'll tell you guys about
intrinsic functions we find the length
of the length of this line and the wheel
you will find a quad quadrant of the
point at all in the CONOPS now coming to
and tutorials and while doing that we
will also cross a lot of features along
with it ok thank you guys for watching
see you guys in the next tutorial bye
guys