[zqlhzx]

Hi foamer.
I want to define "scalarFieldField tspecies(19)",code as following:

 #include "scalarFieldField.H"  
scalarFieldField tspecies(19);
    for (label i=0; i<Y.size(); i++) 
    {
                  tspecies[i](tableProperties.lookup(Y[i].name())); 
}

however,it gave me error:

readTableProperties.H: In function ‘int main(int, char**)’:
readTableProperties.H:28:1: error: ‘scalarFieldField’ was not declared in this scope
readTableProperties.H:28:18: error: expected ‘;’ before ‘tspecies’
readTableProperties.H:34:19: error: ‘tspecies’ was not declared in this scope

How can I solve the problem?
Thank in advance!

[Lieven]

The way I understand it, is that scalarFieldField does not define a type like e.g. scalarList. So you can't create objects of this type since it simply does not exist. Instead, the source files (scalarFieldField.C and .H) define how objects of the type FieldField<Field, scalar> should handle a number of basic operations. So if you want to create an object which behaves as a scalarFieldField you should create it as

FieldField<Field, scalar> tspecies(19);

At least that's what I think ...

[zqlhzx]

Dear Lieven,
What you think is right!
It really works for me!Thank you for you help!Good luck!

[zqlhzx]

Originally Posted by Lieven

The way I understand it, is that scalarFieldField does not define a type like e.g. scalarList. So you can't create objects of this type since it simply does not exist. Instead, the source files (scalarFieldField.C and .H) define how objects of the type FieldField<Field, scalar> should handle a number of basic operations. So if you want to create an object which behaves as a scalarFieldField you should create it as

FieldField<Field, scalar> tspecies(19);

At least that's what I think ...

Dear Lieven,
I wirte the following codes in my solver and it can be compiled successfully.Could I ask you another question?

Info<< "Reading table properties\n" << endl; 
    IOdictionary tableProperties 
    ( 
        IOobject 
        ( 
            "tableProperties", 
            runTime.constant(), 
            mesh, 
            IOobject::MUST_READ, 
            IOobject::NO_WRITE 
        ) 
    );
FieldField<Field,scalar> tspecies(19); 
    for (label i=0; i<Y.size(); i++) 
    { 
                  scalarField A(tableProperties.lookup("Y[i].name()")); 
                  tspecies[i]=A; 
    }

What I'd like to ask you is something about "(tableProperties.lookup("Y[i].name()")".In my tableProperties ,it is :

FoamFile
{
version     2.0;
format      binary;
class       dictionary;
location    "constant";
object      tableProperties;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 

CH4
(
0.0000    0.0120    0.0240    0.0360    0.0480    0.0060    0.0720    0.0840    0.0960    0.1080
0.1200    0.1320    0.1440    0.1560    0.1680    0.1800    0.1920    0.2040    0.2160    0.2280
0.2400    0.2520    0.2640    0.2760    0.2880    0.3000    0.3120    0.3240    0.3360    0.3480
0.3600    0.3720    0.3840    0.3960    0.4080    0.4200    0.4320    0.4440    0.4560    0.4680 
0.4800    0.5000    0.5250    0.5500    0.5750    0.6000    0.6250    0.6500    0.6750    0.7000
0.7250    0.7500    0.7750    0.8000    0.8500    0.9000    0.9500    1.0001
);
O2
(
0.0000    0.0120    0.0240    0.0360    0.0480    0.0060    0.0720    0.0840    0.0960    0.1080
0.1200    0.1320    0.1440    0.1560    0.1680    0.1800    0.1920    0.2040    0.2160    0.2280
0.2400    0.2520    0.2640    0.2760    0.2880    0.3000    0.3120    0.3240    0.3360    0.3480
0.3600    0.3720    0.3840    0.3960    0.4080    0.4200    0.4320    0.4440    0.4560    0.4680 
0.4800    0.5000    0.5250    0.5500    0.5750    0.6000    0.6250    0.6500    0.6750    0.7000
0.7250    0.7500    0.7750    0.8000    0.8500    0.9000    0.9500    1.0001
);
CO2
(
0.0000    0.0120    0.0240    0.0360    0.0480    0.0060    0.0720    0.0840    0.0960    0.1080
0.1200    0.1320    0.1440    0.1560    0.1680    0.1800    0.1920    0.2040    0.2160    0.2280
0.2400    0.2520    0.2640    0.2760    0.2880    0.3000    0.3120    0.3240    0.3360    0.3480
0.3600    0.3720    0.3840    0.3960    0.4080    0.4200    0.4320    0.4440    0.4560    0.4680 
0.4800    0.5000    0.5250    0.5500    0.5750    0.6000    0.6250    0.6500    0.6750    0.7000
0.7250    0.7500    0.7750    0.8000    0.8500    0.9000    0.9500    1.0001
);
H2O
(
0.0000    0.0120    0.0240    0.0360    0.0480    0.0060    0.0720    0.0840    0.0960    0.1080
0.1200    0.1320    0.1440    0.1560    0.1680    0.1800    0.1920    0.2040    0.2160    0.2280
0.2400    0.2520    0.2640    0.2760    0.2880    0.3000    0.3120    0.3240    0.3360    0.3480
0.3600    0.3720    0.3840    0.3960    0.4080    0.4200    0.4320    0.4440    0.4560    0.4680 
0.4800    0.5000    0.5250    0.5500    0.5750    0.6000    0.6250    0.6500    0.6750    0.7000
0.7250    0.7500    0.7750    0.8000    0.8500    0.9000    0.9500    1.0001
);

(In fact,the values in different species is different.I just show it as example).It should be that Y[0].name()=CH4,Y[1].name()=O2.Y[2].name()=CO2,Y[3].name()=H2O. I want to make "scalarFIeld A" is equal to the values for different species.
So lookup (Y[i].name).
If I use

scalarField A(tableProperties.lookup("CH4"))

it can work,and my case can run.However,if I use

scalarField A(tableProperties.lookup("Y[i].name()"))

then I run my case ,it give me error:

keyword Y[i].name() is undefined in dictionary "/home/acer/OpenFOAM/acer-2.2.2/run/singlefirepoolx/constant/tableProperties"

Then I get rid of the "" like:

scalarField A(tableProperties.lookup(Y[i].name()))

it still gave me error:

FOAM FATAL ERROR:
hanging pointer at index 0 (size 19), cannot dereference

From function PtrList:perator[]
in file /opt/openfoam222/src/OpenFOAM/lnInclude/PtrListI.H at line 150.
FOAM aborting

What do you think about my error?Could you give me some advises?Thank you !