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Recent questions tagged fortran

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fortran - Conditional compilation in gfortran

I want to know if it is possible to select different parts of my Fortran 95 routine to compile. For example, ... and that my question is clear. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran, passing allocatable arrays to a subroutine with right bounds

I need in a program to pass some allocatable arrays to subroutines, and i need to know if the way I do it ... ?) and are their behavior normal? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Extended double precision

Is it possible to obtain more than 16 digits with double precision without using quadruple? If it is possible, ... and had 22 digit precision. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - What are submodules and how are they used?

I don't quite understand the purpose of submodules. I know there's very little support for them in most ... someone could provide an example. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - How can gfortran tell if I am compiling f90 or f95 code?

I understand gfortran can compile f90 or f95? How does it know which one it is compiling? Also can it compile ... I need to download gfortran? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Function with more arguments and integration

I have I simple problem but I cannot find a solution anywhere. I have to integrate a function (for example ... Any help? Thanks in advance! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Opening a file on unit 5 or 6

I have a read/write operation going on in the Fortran code snippet as follows OPEN(5,FILE='WKDAT.dat', ... by the computer operating system." See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Does the finalization routine need to be elemental in order to be called on the elements of allocatable array that goes out of scope?

If I have an allocatable array of a finalizable derived type, will the finalizer be called on every individual ... application I'm overlooking? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - When is array deallocating necessary?

I have read that applying DEALLOCATE to an allocated array frees the space it was using. I deal with ... eventually affect the performance. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Can not install gfortran via homebrew

I got this message when i tried to install gfortran. ~$ brew install gfortran Error: No available formula for ... program f951) Abort trap: 6 See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Error: Non-numeric character in statement at label (1)

This is the program I compile on ubuntu 14.04 using f95 First.f -o First and the program is !My first ... How do you address this error? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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646 views

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fortran - Why define PI = 4*ATAN(1.d0)

What is the motivation for defining PI as PI=4.D0*DATAN(1.D0) within Fortran 77 code? I understand how it works, but, what is the reasoning? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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fortran - Providing an argument that has not the TARGET attribute to a procedure with a dummy argument that has the TARGET attribute

In Fortran language, providing an argument that has not the TARGET attribute to a procedure with a dummy ... tab end subroutine end program See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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731 views

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fortran - Variable format

I wrote a program to calculate a square finite difference matrix, where you can enter the number of rows (equals ... and what is my mistake? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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686 views

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fortran - gfortran does not allow character arrays with varying component lengths

See the example below program test character(10),dimension(5):: models = (/"feddes.swp", "jarvis89.swp", ... any way to circumvent this problem? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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849 views

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fortran - MPI_Gather gives seg fault in the most basic code

I am working on a much bigger program where I struggle with MPI_Gather. I wrote a minimal example code, see below ... on the machine I am using. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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645 views

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fortran - Unexpected data declaration statement

I'm writing a code for LU decomposition and I don't know how to fix the "unexpected data declaration statement" pointed at ... , 7x, 3(F8.4)) ! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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433 views

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fortran - how to write wrapper for 'allocate'

I am trying to write a wrapper for 'allocate' function, i.e. function which receives an array and dimensions ... such wrapper?.. Thanks! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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527 views

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fortran - What are the ways to pass a set of variable values through the subroutine to a function without common block?

I do not want to use common blocks in my program. My main program calls a subroutine which calls a function. The ... g2,h2,p2,q2,r2,d2 end See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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856 views

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fortran - Error: Nonnegative width required in format string at (1)

I'm trying to compile a piece of code with gfortran and it's failing with the following error: Error: Nonnegative ... ) How can I compile this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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767 views

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fortran - Difference between intent(out) and intent(inout)

According to the Fortran standard: The INTENT (OUT) attribute for a nonpointer dummy argument specifies that the dummy ... (out) are the same. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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