Dear Philippe,
It works fine with some modifications, such as
pp[0] = new double[s]; ...
Thank you.
Best Regards,
Hajime
> Hi,
>
> The syntax:
> double (*pp)[2];//[size]
> is not supported.
> Instead use:
> double *pp[2];//[size]
>
> This does means an invertion on the indexes.
> You initalization loops becomes:
> for(int j=0;j<data->size;j++) {
> data->p[j] = j*10.+i;
> data->pp[0][j] = j*10.+i;
> data->pp[1][j] = j*10.+i+1;
> }
>
> Cheers,
> Philippe.
>
> -----Original Message-----
> From: owner-roottalk@pcroot.cern.ch
> [mailto:owner-roottalk@pcroot.cern.ch]On Behalf Of Hajime Nanjyo
> Sent: Thursday, July 24, 2003 4:11 PM
> To: roottalk@pcroot.cern.ch
> Subject: [ROOT] variable 2-dim array in a class for root I/O
>
>
> Dear Rooters,
>
> I would like to use a 2-dim. array of variable size
> within a class which is used for ROOT I/O.
>
> Some simple codes are listed below to show what I want to do.
> (A 2-dim. array is declared in MyClass.h.)
>
> These codes were compiled successfully and the application
> run without error. But the 2-dim. array was not stored
> in the ROOT file.
>
> I'm afraid the expression, "double (*pp)[2];//[size]" ,
> is not supported.
> Could you tell me how to do ?
>
> Best Regards,
> Hajime
>
> ////////////////////////////////
> g++ `root-config --cflags` -c MyClass.C
> rootcint -f MyClssDict.C -c MyClass.h MyClassLinkDef.h
> g++ `root-config --cflags` -c MyClassDict.C
> g++ -shared -O MyClass.o MyClassDict.o -o libMyClass.so
> g++ `root-config --cflags` -c write.C
> g++ write.o libMyClass.so `root-config --libs` -o write
> ./write
>
>
>
> ////////////////////////////////
> // MyClass.h
> #ifndef MyClass_HH
> #define MyClass_HH
>
> #include "TObject.h"
>
> class MyClass: public TObject
> {
> public:
> MyClass();
> ~MyClass();
> void Init(int s);
> void Fin();
>
> public:
> int size;
> double *p;//[size]
> double (*pp)[2];//[size]
> // ^^^^^^^^^^^^^^^^
> // such kind of expression is supported?
>
> ClassDef(MyClass,1) //MyClass
> };
>
> #endif
> ////////////////////////////////
> // MyClass.C
> #include "MyClass.h"
> #if !defined(__CINT__)
> ClassImp(MyClass);
> #endif
> MyClass::MyClass() {
> size=0;
> p=0;
> pp=0;
> }
>
> MyClass::~MyClass() {
> ;
> }
>
>
> void MyClass::Init(int s) {
> size=s;
> p = new double[s];
> pp = new double[s][2];
> }
>
> void MyClass::Fin() {
> delete [] p;
> delete [] pp;
>
> p=0;
> pp=0;
> size=0;
> }
> ////////////////////////////////
> // MyClassLinkDef.h
> #ifdef __CINT__
> #pragma link off all globals;
> #pragma link off all classes;
> #pragma link off all functions;
> #pragma link C++ class MyClass+;
>
>
> #endif
> ////////////////////////////////
> // write.C
> #include "TApplication.h"
> #include "TFile.h"
> #include "TTree.h"
> #include "MyClass.h"
>
> int main(int argc,char** argv)
> {
> TApplication app("app", &argc, argv);
> TFile *tf = new TFile("tmp.root","RECREATE");
> TTree *tree = new TTree("tree","tmp");
>
> MyClass *data = new MyClass();
> tree->Branch("data","MyClass",&data);
>
> for (int i=0;i<5;++i) {
> data->Init(i+1);
> for(int j=0;j<data->size;j++) {
> data->p[j] = j*10.+i;
> data->pp[j][0] = j*10.+i;
> data->pp[j][1] = j*10.+i+1;
> }
> tree->Fill();
> data->Fin();
> }
>
> tf->Write();
> delete data;
>
> return 0;
> }
> ////////////////////////////////
>
> #################################################################
> #################################################################
> #################################################################
> #####
> #####
> #####
> #################################################################
> #################################################################
> #################################################################
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