Hi,
The file I sent to you yesterday was OK.
I repost it (in the attachement).
With this file, just do:
root > .L test.cc++
root > test()
Rene Brun
On Thu, 21 Nov 2002, Yiqun Wang wrote:
> Hi,
>
> So I try to compile the attached "test.cc". If I do not comment out those
> "ClassDef(FitEvent,1)", I got an error:
>
> /tmp/cc3seyVF.o: In function `SmdPeak::SmdPeak(void)':
> /home/yqwang/working/K0-short/test.cc:14: undefined reference to `FitEvent
> virtual table'
> collect2: ld returned 1 exit status
> gmake: *** [test] Error 1
>
> If I comment out "ClassDef(FitEvent,1)", compilation is successful.
> However, when I run the program, I will get this error:
>
> Error in <TTree::Bronch>: Cannot find class:FitEvent
>
> and I will not get the branch in the root file.
>
> Yiqun Wang
>
> > Don't use typedefs, like in your original example, plain structs like
> > this should work too (struct is an all public class in c++):
> >
> > struct SmdPeak {
> > Float_t peakPos;
> > Float_t peakEnerg;
> > Float_t sigmaPeak;
> > Int_t corSimuPeak;
> > bool used;
> >
> > SmdPeak() {}
> >
> > ClassDef (SmdPeak,1)
> > };
> >
> >
> > -- Fons
> >
> >
> > On Thu, 2002-11-21 at 16:25, Rene Brun wrote:
> >> Hi,
> >>
> >> Create classes instead of struct as shown below
> >>
> >> Rene Brun
> >>
> >>
> >> #include "TTree.h"
> >> #include "TFile.h"
> >> #include "TRandom.h"
> >>
> >> class SmdPeak {
> >>
> >> public:
> >> Float_t peakPos;
> >> Float_t peakEnerg;
> >> Float_t sigmaPeak;
> >> Int_t corSimuPeak;
> >> bool used;
> >>
> >> SmdPeak() {}
> >>
> >> ClassDef (SmdPeak,1)
> >> };
> >>
> >> class FitEvent {
> >>
> >> public:
> >> UInt_t runnumber;
> >> Int_t event;
> >> Int_t numbXPeaks;
> >> Int_t numbYPeaks;
> >> Float_t tower[4][3];
> >> Float_t smdX[61];
> >> Float_t smdY[101];
> >> SmdPeak xPeak[4];
> >>
> >> ClassDef(FitEvent,1)
> >> };
> >>
> >> void struct2()
> >> {
> >> TFile f("struct.root","recreate");
> >> TTree T("T","test struct");
> >> FitEvent *event = new FitEvent;
> >>
> >> T.Branch("first","FitEvent",&event);
> >> for (Int_t i=0;i<1000;i++) {
> >> event->event = i;
> >> event->runnumber = (UInt_t)(100*gRandom->Rndm());
> >> //for (Int_t j=0;j<event.count;j++) event.meas[j] = i+j;
> >> T.Fill();
> >> }
> >> T.Print();
> >> T.Show(45);
> >> T.Write();
> >> }
> >>
> >>
> >> On Wed, 20 Nov 2002, Yiqun Wang wrote:
> >>
> >> > Hi,
> >> >
> >> > Is there a way to create a branch that is an array of C structure?
> >> The online reference on
> >> >
> >> > TBranch(const char *name, void *address, const char *leaflist, Int_t
> >> basketsize, Int_t compress) :TNamed(name,leaflist)
> >> >
> >> > only talked about a C structure branch.
> >> >
> >> > My header file is like this:
> >> >
> >> >
> >> > typedef struct{
> >> > Float_t peakPos;
> >> > Float_t peakEnerg;
> >> > Float_t sigmaPeak;
> >> > Int_t corSimuPeak;
> >> > bool used;
> >> > } SmdPeak;
> >> >
> >> > typedef struct{
> >> >
> >> > UInt_t runnumber;
> >> > Int_t event;
> >> > Int_t numbXPeaks;
> >> > Int_t numbYPeaks;
> >> > Float_t tower[4][3];
> >> > Float_t smdX[61];
> >> > Float_t smdY[101];
> >> > SmdPeak xPeak[4];
> >> > SmdPeak xPeak[4];
> >> > } FitEvent;
> >> >
> >> >
> >> >
> > --
> > Org: CERN, European Laboratory for Particle Physics.
> > Mail: 1211 Geneve 23, Switzerland
> > E-Mail: Fons.Rademakers@cern.ch Phone: +41 22 7679248 WWW:
> > http://root.cern.ch/~rdm/ Fax: +41 22 7679480
>
>
>
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