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i'm using Fortran 90. i use lots of subroutines (each of which are given the PUBLIC attribute). in most of these subroutines i'm using ALLOCATABLE matrices -- which are "locally within" each subroutine. for ease of programming, i've thought of a "universal" way of naming INTEGER variables...

i'm using fortran 90/95. i'm using recursive subroutines. i want to use an optional argument within one of these subroutines. i'm trying to determine whether i can. basically, i want to know if the following situation is valid :- 1) a recursive subroutine has the optional argument declared...

i'm using fortran 90/95. i'm using recursive subroutines. i need to use arrays within these subroutines. i'm trying to determine whether i can use allocatable arrays, or whether i instead have to use "fixed size" arrays. as you probably know, when using allocatable arrays, if they have already...

i'm using fortran 90/95. i'm using a lot of (multi-dimensional) matrices. forgetting about program performance / efficiency / etc, is there a limit to the number of dimensions each matrix can have ? for example, say i have REAL, DIMENSION ( IA , JA , KA , ... , ) :: A where IA, JA, KA, etc...

i'm using fortran 90/95. i'm using derived type structures. some of these type structures contain other type structures (which, in turn, might contain other type structures, etc). for example, i might have the following :- TYPE T_T1 TYPE (T_T2) :: T2 END TYPE T_T1 TYPE T_T2 TYPE (T_T3)...

all REAL variables need to be given a value (i.e. initialised) if they are to be either 1) written to the screen, or 2) written to a file, or 3) used in calculations. for example, a common way to initialise such variables is to set them equal to zero. such variables include "CUMULATIVE SUM...

i'm a bit confused. i'm using Fortran 90/95. i'm using modules; each module CONTAINS one (and only one) subroutine. i want to use 'assumed shape arrays' in all of my subroutines. this means that, when declaring dummy argument arrays/matrices, i don't need to declare the dimensions of each...

i have a few questions about a program i'm writing in fortran 90. i've written a few explanation notes below, followed by my questions. PRECISION IN FORTRAN 90 to enable portability between different computers, i'm declaring real variables using the KIND parameter, according to integer...

i program in Fortran 90. i have a question about declaring parameterised real variables, as follows. first, to enable portability between different computers, i'm declaring real variables using the KIND parameter, according to integer, parameter :: PN_RL = selected_real_kind(p=15)...

This is a quick reply to a previous post. I tried to reply to the original post directly, but the post had been declared 'closed'. So, i'm posting my reply here (as a 'new' post), in the hope that people might find it helpful. The original post that i'm replying to was called ''Function 'cosd'...

Hi all I'm new to this forum. I have a problem in Fortran 90. It is described below. The line 'IMPLICIT NONE' makes it impossible to implicitly declare VARIABLES. I'd like to know if there is a similar line (or way of declaring) that makes it impossible to implicitly declare STATEMENTS -- in...