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FORTRAN QUESTIONS

Solving quadratic equation but getting weird errors
Solving quadratic equation but getting weird errors
wish help you to fix your issue Re the additional question of how to loop back to redo input -- an example program demonstrating loop features of Fortran >= 90. The loop is apparently infinite -- exit controlled by the IF statement exits the loop and
TAG : fortran
Date : November 23 2020, 07:00 PM , By : user3862601
cannot set a breakpoint in gdb
cannot set a breakpoint in gdb
wish of those help I am trying to run a Fortran MPI code in gdb. Compiled with GNU. For the purposes of debugging, I am running with only one process. I cannot get the code to actually stop at any breakpoint. For instance, I want it to stop at line 1
TAG : fortran
Date : November 14 2020, 07:01 PM , By : justLin
Why 5/10 division is resulting 0.00000E+00 in Fortran?
Why 5/10 division is resulting 0.00000E+00 in Fortran?
I wish this help you Fortran evaluates 5 / 10 before assigning the value to r.The result of 5 / 10 is 0 because both operands are integers.
TAG : fortran
Date : October 12 2020, 12:00 AM , By : Mikael Bugnon
Problems with an exponential taylor series
Problems with an exponential taylor series
will be helpful for those in need You have several problems.First of all, you are not initializing expseries. You should set it before the loop. Right now, the result is completely arbitrary, since the initial value of expseries is undefined.
TAG : fortran
Date : October 11 2020, 12:00 AM , By : Ramakrishna kanna
Reading real*8 variable with value 0 with real*4 results a large number in fortran without warning
Reading real*8 variable with value 0 with real*4 results a large number in fortran without warning
hop of those help? It is not the problem of the compiler. It is the problem of the code. Your code did issue a warning for me that you were doing something nefarious, as it should. The subroutine that thinks dsecs is 4 bytes long sent 4 bytes. The su
TAG : fortran
Date : October 11 2020, 12:00 AM , By : user6033303
Checking the size of an array passed to a function
Checking the size of an array passed to a function
wish helps you Disclaimer: The author ask for an option to catch the bug. This answer doesn't provide it.
TAG : fortran
Date : October 09 2020, 10:00 PM , By : Welton Batista
passing values to interactive fortran program using echo command
passing values to interactive fortran program using echo command
This might help you If you are using bash (or similar), I think echo -e or printf will be useful (but please check this page also). For example, either of
TAG : fortran
Date : October 08 2020, 01:00 PM , By : Shane Alexander
In MPI how to get communicator when using several executables?
In MPI how to get communicator when using several executables?
like below fixes the issue There is no such predefined communicator specified by the standard.The great philosopher Jagger once said “you can’t always get what you want” and your best bet here is indeed to use MPI_Comm_split() and the value of MPI_CO
TAG : fortran
Date : October 08 2020, 03:00 AM , By : Kamunge
How to determine file size in Fortran 77
How to determine file size in Fortran 77
I hope this helps . As Ian noted, any modern Fortran compiler should have INQUIRE. A simple test of
TAG : fortran
Date : October 06 2020, 07:00 AM , By : Yancey Allen
Interoperability: Fortran to C++
Interoperability: Fortran to C++
this will help The code in your "Update 2" is perfectly fine and works with Intel Visual Fortran and Microsoft Visual C++. See also the discussion you started in https://software.intel.com/en-us/forums/intel-visual-fortran-compiler-for-windows/topic/
TAG : fortran
Date : October 05 2020, 01:00 PM , By : mfallavol
How does the Alternate Return feature of Fortran compare to coroutines and generators?
How does the Alternate Return feature of Fortran compare to coroutines and generators?
wish helps you Alternate returns simply allow a routine to return somewhere else than immediately after the call. There is no ability for "suspending their execution and allowing re-entry". You can think of alternate returns as a computed GOTO after
TAG : fortran
Date : October 04 2020, 10:00 PM , By : SUNIL SINGH
index function returning many values
index function returning many values
will help you The bug:You defined your string as an array of single characters of length 10:
TAG : fortran
Date : October 04 2020, 10:00 PM , By : cybergwd
How does the comma in line 2 translate to Fortran
How does the comma in line 2 translate to Fortran
wish of those help ATAN2 is a Fortran function of two arguments. It is a common function that exists in several other programming languages as well, probably also in the language you are copying your lines from. You should have told us which language
TAG : fortran
Date : October 04 2020, 11:00 AM , By : Hamed Mirbeig
How to get rid of a specific gfortran warning?
How to get rid of a specific gfortran warning?
it should still fix some issue If you are compiling the source code that generates that warning, then you have access to that source code. So you can modified the source code, but you just don't want to modified it. -Wno-align-commons controls warnin
TAG : fortran
Date : October 01 2020, 10:00 AM , By : Mudassir
How to break to new line in Fortran when printing?
How to break to new line in Fortran when printing?
I hope this helps you . It is very simple query but I'm not able to find the exact solution. How to break to new line when printing in Fortran? , There are several ways to print two lines of output.
TAG : fortran
Date : October 01 2020, 07:00 AM , By : solo cvateja
How to get mpif90 compiler for OpenSUSE Leap 15.0?
How to get mpif90 compiler for OpenSUSE Leap 15.0?
help you fix your problem From the package repositories, install an MPI implementation such as Open MPI (I don't use OpenSUSE myself so I don't know what the name of the package is, but I'm sure you'll find it if you use the search functionality of t
TAG : fortran
Date : September 30 2020, 06:00 PM , By : Jp Ride
Is RETURN statement before END SUBROUTINE in Fortran codes considered a good practice?
Is RETURN statement before END SUBROUTINE in Fortran codes considered a good practice?
Hope that helps As the Intel guide mentions, it's pointless since the "end subroutine" statement already handles it. Return is useful if you need to, say, return inside a loop or such (but then there's a school of thought saying you should structure
TAG : fortran
Date : September 27 2020, 07:00 PM , By : Caleb
Wrong result for the Inverse Matrix
Wrong result for the Inverse Matrix
This might help you (illustration using Mathematica)The problem is not related to MKL. Your matrices are singular for dime>2. MKL is not supposed to give a correct matrix inverse for a matrix that has no inverse.
TAG : fortran
Date : September 27 2020, 01:00 PM , By : 高杉君
How to read the real and complex numbers in a unified way in Fortran?
How to read the real and complex numbers in a unified way in Fortran?
around this issue Suppose I have a data file (fort.100) including the data like, , Please try this as simple solution for your issue:
TAG : fortran
Date : September 27 2020, 07:00 AM , By : Fæz
Ignoring the intrinsic gamma function with gfortran
Ignoring the intrinsic gamma function with gfortran
will be helpful for those in need Ok, so I am using this old Fortran code that has defined a function that has nothing to do with the mathematical gamma function with the name gamma. , Add
TAG : fortran
Date : September 25 2020, 04:00 PM , By : Jakub Plichta
Can't input value in f(x) in this Fortran code?
Can't input value in f(x) in this Fortran code?
wish helps you Be advised that statement functions, the function definitions the OP uses, are obsolescent.
TAG : fortran
Date : September 24 2020, 02:00 PM , By : Linkun
Fortran can't read from file
Fortran can't read from file
With these it helps It seems to me that your file is a formatted file (in fact you use * as format). However you define it as 'unformatted' in the open statement. Try to set
TAG : fortran
Date : September 22 2020, 06:00 PM , By : wkupaochuan
Comparing elements of a Fortran matrix to the average of the entire matrix and remembering the index of the number close
Comparing elements of a Fortran matrix to the average of the entire matrix and remembering the index of the number close
I hope this helps . I don't have Fortran on this machine so there may be some syntactic errors in what follows. First, let's find the mean of all the values in mat:
TAG : fortran
Date : September 22 2020, 07:00 AM , By : hojun
Using MPI_PUT in fortran and different ranks have different displacements using c_loc
Using MPI_PUT in fortran and different ranks have different displacements using c_loc
I wish did fix the issue. I can answer item 2, at least. You have:call c_f_pointer(c_loc(r(1,1)),fptr) loc_base = fptr
TAG : fortran
Date : September 20 2020, 12:00 AM , By : AdemirM
Is there a Gfortran flag similar to intel ifort's -ipo-c, that would generate single optimized object from all compiled
Is there a Gfortran flag similar to intel ifort's -ipo-c, that would generate single optimized object from all compiled
may help you . GCC has -fwhole-program, does that work for gfortran?Or if you don't want to pass all the Fortran source files on one giant command line, there's -flto link-time optimization which uses a linker "plugin" to run the optimizer on GIMPLE
TAG : fortran
Date : September 19 2020, 12:00 PM , By : Marcus Mardis
What does o'377' mean in Fortran 77?
What does o'377' mean in Fortran 77?
around this issue It's an octal (base 8) representation. 377 octal is 255 decimal or FF hex.
TAG : fortran
Date : September 11 2020, 07:00 AM , By : Ekkachap
How can I specify in fortran compiler that declared variables shoud not be potentially treated as implicit function decl
How can I specify in fortran compiler that declared variables shoud not be potentially treated as implicit function decl
hop of those help? "But when linking there is no error considering the missing symbol es !"There is not supposed to be one. es is the name of the dummy argument, not the name of the actual procedure that you would pass there. What would actually happ
TAG : fortran
Date : September 09 2020, 04:00 AM , By : Robert
What does this syntax mean in fortran?
What does this syntax mean in fortran?
around this issue What you are most likely looking at is Fixed source-form statement continuation which is part of the Fixed source form. Fixed-form formatting is an old way of formatting code which still stems from the old punched-cards. Lines could
TAG : fortran
Date : September 08 2020, 12:00 AM , By : Stefan Beier
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