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Re: need help reading binary FORTRAN data [message #68467 is a reply to message #68323]

Wed, 21 October 2009 08:44

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

That syntax, INTEGER*4, REAL*8, etc is, as you say, not in any Fortran standard but are
ubiquitous extensions. But, where those Fortran extensions are allowed, the "4" and "8"
above are indeed the length (read: number of bytes) and not the kind type. Kind types
didn't exist at all in Fortran until Fortran90, and the INTEGER*4, etc extensions were
available before that (and still are for those norty folks who continue to use them.... :o)

cheers,

paulv

pp wrote:
> Note that things like INT*4 do not universally tell how many bytes are
> used in that integer. The Fortran standard does not specify which kind
> corresponds to which size of variable, it is up to the implementation
> to define which kind number corresponds to which variable size. It is
> common that INT*4 means a 4-byte integer, but it does not have to be
> so. That is the reason why Fortran has functions like
> selected_int_kind, to pick the proper kind number.

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[Message index]

		Re: need help reading binary FORTRAN data By: penteado on Tue, 20 October 2009 13:56
		Re: need help reading binary FORTRAN data By: Laura on Tue, 20 October 2009 11:13
		Re: need help reading binary FORTRAN data By: Andy Heaps on Tue, 20 October 2009 10:38
		Re: need help reading binary FORTRAN data By: Paul Van Delst[1] on Wed, 21 October 2009 08:44

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