[ds-gti]

Hi,

I would like to insert a scalar into the for-loop condition which is looked up in any datafile like controlDict or fvSolution.

I tried to use these two examples located in the main funtion of myFoam.C

dictionary outerloop = mesh.solutionDict().subDict("OUTERLOOP");
int nOuterCorr(readInt(outerloop.lookup("nOuterCorrectors")));
//or
scalar mIt = readScalar(solutionDict.lookup("mIt"));

to call it

for (int m=0; m<nOuterCorr; m++)
...
//or
for (int m=0; m<mIt; m++)
...

in fvSolution I added:

OUTERLOOP
{
    nOuterCorrectors 3;
}
//or
mIt             3;

None of them works, where are I am mistaken?

Thanks for advise!
David

[romant]

what does not work? do you get an error upon compiling? do you get an error at all? does it run without complaining and just not read the value?

[ds-gti]

Thank you for your reply Roman.

It does not read the scalar mIt and in the second case the compiling-report tells: unused parameter nOuterCorr (but it should be used in the for-condition).

Do you use the same or similar code successfully?

[romant]

hej,

if you dfine your scalar before as for example

scalar mIt_;  // in the header
// and then use just
mIt_(outerLoop.lookup("mIt")) ; // in the C file

or just

outerLoop.lookup("mIt") >> mIt ;

[ds-gti]

thank you so much, I will try it!

What is the meaning of the _ (underline) and does the >> perform a shift?

[romant]

underlines like "_" are usually appended to a variable in order to show that we speak about a private variable in a class

the ">>" gives the stream into a variable. It is part of the standard IO package of c++

[ds-gti]

Hi,

I am sorry, it returns:

TPlusLTest.C: In function âint main(int, char**)â:
TPlusLTest.C:65: error: âmItâ was not declared in this scope
make: *** [Make/linux64GccDPOpt/TPlusLTest.o] Error 1

my corrections:

#include "fvCFD.H"

scalar mIt_;

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
...
dictionary outerLoop = mesh.solutionDict().subDict("OUTERLOOP");
    outerLoop.lookup("mIt") >> mIt; //line 65!
...
for (int m=0; m<mIt; m++)

Did I missunderstood your advise?

[romant]

Originally Posted by ds-gti

Hi,

I am sorry, it returns:

TPlusLTest.C: In function âint main(int, char**)â:
TPlusLTest.C:65: error: âouterLoopâ was not declared in this scope
TPlusLTest.C:65: error: âmItâ was not declared in this scope
make: *** [Make/linux64GccDPOpt/TPlusLTest.o] Error 1

my corrections:

#include "fvCFD.H"

scalar mIt_;

// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

int main(int argc, char *argv[])
{
...
dictionary outerloop = mesh.solutionDict().subDict("OUTERLOOP");
    outerLoop.lookup("mIt") >> mIt; //line 65!
...
for (int m=0; m<mIt; m++)

Did I missunderstood your advise?

you are missing the underline at all the other parts in the code, either you write the variable with underline or without underline, but don't mix it

[ds-gti]

It works finally, thanks a lot!