fortran 90-95 tutorial no1

[Aryry2011]

many thanks for tutorial ^^

[LukaszSkora1986]

Hi do you recommend any Fortran tutorials or books which you studied from because I cannot pass this class it will be my fourth time taking it. Thankyou!

[WizardofCake]

Nice, thanks George.

[leahcim998]

PUSH START TO NO.1

[jonboyjon1976]

Thanks for posting this! I was always interested in Fortran, especially considering its history and relevance for other languages.

[LeTha4]

Hello . I have a problem with this program and i not able to find the reason,its installed correctly,when i make a program after compile and build when i try to start the executable for the project so i can see the results the "command prompt' window appear and disappear,and i cant find why or how to fix it.Anyone that knows or had the same problem plz help :) (using windows 7 -64bit which i think is the problem here but dunno how to fix it)

[gdlignos]

@LeTha4 Hi there, it seems that your program is executed and then it closes very fast. What you could do is to add a couple of commands and declare a temp variable as follows:

character:: temp

.....

...

print*, "please type something and press enter"

read*, temp

This way you will have as much time as you want until you have given the value of the variable temp

[LeTha4]

@gdlignos i dont think thats the problem,i tryied it but still the command window shows up and disappears with not showing anything

[SADFACE1000]

I am studying to be a chemical engineer and i was wondering why the heck do we learn fortran and not one of the more common languages? Do you find yourself needing to use fortran on a daily basis?

[glykoulis]

@SADFACE1000

It's a very common question. Truth is that there are other more handy languages. The answer teachers gave me is that fortran is constructed for mathematicians and engineers and there is a huge number of programs already built in fortran.

Please do not judge easily Fortran as 90-95 is much easier than the ancient 77 and it is also compatible with inheritance.

I personally programmed my diploma thesis in f95.

Please note that fortran and C++ are about 10 times faster than JAVA!

[theleftflank]

@glykoulis

How is that? How is it that fortran and C++ are so much faster than Java? Please respond to me on this point. Thanks

[glykoulis]

@theleftflank

Thnx for asking. Dongara has done quite a lot of work on comparing efficiency of processors. I would suggest to check why he is using only Fortran for these tests.

I cannot answer to you why, because I don't know. I don't have access to papers lately, but it seams that I read it here: =>

Bräysy O. Gendreau M. 2005. Vehicle Routing Problem with Time Windows, Part II: Metaheurestics Transportation Science Vol. 39, No. 1, February 2005, pp. 119-139

[santoory]

@theleftflank because Java runs on Java virtual machine vs C++/C/Fortran run straight on your computer hardware

[santoory]

@theleftflank and also, C/C++ are NOT 10 TIMES FASTER THAN JAVA. That book that he's referring you to is from 2005 aka its too old!

[theleftflank]

@santoory

Thanks pal. Your two answers make perfect sense.

[ffxme]

@santoory Compiled languages are still much much faster than interpreted languages and always will be.

[santoory]

@ffxme lol thanks for letting me know captain obvious

[ffxme]

@santoory You're welcome kind civilian, whenever you need me, captain obvious will always be there to help.

[TheBowlcutBandit]

@theleftflank Java is interpreted which is another layer between the code and the processor, C++ and FORTRAN compile to machine code, therefore are read by the CPU faster.

[9980332666]

@glykoulis How do I compile several programs f.90

[ChiIdKiIIer]

@SADFACE1000 they dont want you to become a hacker haha