Modules and allocating
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From: Allamarein on 26 Jun 2010 12:45 On 26 Giu, 17:32, dpb <n...(a)non.net> wrote: > Ron Shepard wrote: > > In article <i04te1$or...(a)news.eternal-september.org>, > > dpb <n...(a)non.net> wrote: > > >> Allamarein wrote: > > ... > > > > > > >>> MODULE STATISTICS > > >>> CONTAINS > > >>> REAL FUNCTION SUM(X) > >>> IMPLICIT NONE > >>> INTEGER :: N > >>> REAL :: RES=0.0 > > > The above is another mistake in this code. This is an > > initialization which is done once (e.g. at the beginning of the > > program, or during compile time), not an assignment that is > > performed each time the function is invoked. > > > As written, this code will sum up the elements of all the array > > arguments that it is ever given throughout a program run. There > > might be reasons you would want to do this, but probably not for > > this function, right? > > >> REAL, INTENT(IN) :: X(:) > >>> N = SIZE(X) > > > RES = 0.0 > > > This is what you probably want here, a regular assignment statement > > that is executed just before the do loop every time the function is > > invoked. > > ... > > Yes; I saw that later and intended to comment on it...glad somebody did > since I forgot about it. > > -- Thanks to everybody. With the wisdom of hindsight my allocating system was rubbish. Now I can go on (probably I will look for a book on amazon)
From: Gib Bogle on 26 Jun 2010 22:25 Allamarein wrote: > Anyway I provided myself with 'Fortran 90/95 Explained' by > M.Metcalfand and J.Reid. > Is it a good book? It is frequently recommended. Good luck with your entry into the world of Fortran. You will not regret it.
From: Allamarein on 27 Jun 2010 04:59 On 27 Giu, 04:25, Gib Bogle <g.bo...(a)auckland.no.spam.ac.nz> wrote: > Allamarein wrote: > > Anyway I provided myself with 'Fortran 90/95 Explained' by > > M.Metcalfand and J.Reid. > > Is it a good book? > > It is frequently recommended. > Good luck with your entry into the world of Fortran. You will not regret it. Thanks. Now I want to find Chapman's book.
From: Ian Bush on 27 Jun 2010 09:00 On Jun 27, 9:59 am, Allamarein <matteo.diplom...(a)gmail.com> wrote: > On 27 Giu, 04:25, Gib Bogle <g.bo...(a)auckland.no.spam.ac.nz> wrote: > > > Allamarein wrote: > > > Anyway I provided myself with 'Fortran 90/95 Explained' by > > > M.Metcalfand and J.Reid. > > > Is it a good book? > > > It is frequently recommended. > > Good luck with your entry into the world of Fortran. You will not regret it. > > Thanks. > Now I want to find Chapman's book. Metcalf, Reid and Cohen is, in my opinion, about the best into text book out there. However rather than Chapman I would get "The Fortran 2003 Handbook: The Complete Syntax, Features and Procedures" by Jeanne C. Adams, Walter S. Brainerd, Richard A. Hendrickson, Richard E. Maine, Jeanne T. Martin and Brian T. Smith as a reference. See http://www.amazon.co.uk/Fortran-2003-Handbook-Complete-Procedures/dp/1846283787/ref=sr_1_6?ie=UTF8&s=books&qid=1277643364&sr=1-6 Alternatively if you're only interested in Fortran 95 I would see if I can pick up a copy of the equivalent book for that standard - it will probably be second hand, Ian
From: viper-2 on 27 Jun 2010 10:07
> I am sure that I good papery reference book is irreplaceable. > Would you suggest me some titles? > Anyway do you know some useful links? > Tutorials step-by-step would be welcome. Yes, the dead tree versions do have advantages - for one thing, they're better for your eyesight. Fortran 95/2003 explained comes highly recommended in this group. Electronic editions have their own strengths too! Finding exactly what you want is fast and easy because your computer will let you search and copy, so here are a few of my links that I found useful last year when I was learning re-Fortran: http://www.star.le.ac.uk/~cgp/f90course/f90.html#tth_sEc2.3 http://www.pcc.qub.ac.uk/tec/courses/f90/stu-notes/F90_notesMIF_1.html http://www.nsc.liu.se/~boein/f77to90/f77to90.html http://www-solar.mcs.st-and.ac.uk/~steveb/course/course.html http://www.stanford.edu/class/me200c/tutorial_90/ http://wwwasdoc.web.cern.ch/wwwasdoc/WWW/f90/f90.html Clive Page maintains a list of resources at: http://www.star.le.ac.uk/~cgp/fortran.html Michel Olagnon also has a list here: http://www.ifremer.fr/ditigo/molagnon/fortran90/engfaq.html#3.5 and this is yet another resource page: http://www.personal.psu.edu/faculty/h/d/hdk/fortran.html You really do have to google, in the archives for this group and on the web generally, to find what you want. Good luck! agt -- Freedom - no pane, all gaiGN! Code Art Now http://codeartnow.com Email: agt(a)codeartnow.com |