[ROOT] Probolems with creating a tree using own class

From: A.Dietz@mpi-hd.mpg.de
Date: Wed May 28 2003 - 11:00:21 MEST 

Hi,

I have a problem with creating a ROOT-Tree with a self made class.
What I want to do is to create a TTree, filling it with a class Test:


Test.hh:

class Test :public TObject {
public:

  Int_t fTest;


  ClassDef(Test,1)
};

The main program looks like this:

#include "Test.hh"
void main(void)
{
  // creating new TFile
  TFile* f=new TFile("tree4.root","RECREATE");

  // creating new TTree
  TTree* t4=new TTree("t4","tree");

  // pointer to new Object
  Test* test=new Test();

  // creating new branch
  t4.Branch("test","Test",&test, 16000,2);

  // filling tree with random values
  for (int ev=0;ev<100;ev++) {
    Int_t value=int(gRandom->Rndm()*100);
    test->fTest=value;
    t4.Fill();
  }

  f->Write();
  f->Close();
}


But this does not work! A segmentation occurs instead.
I am working with ROOT Version 3.05/02 with  Linux version 2.4.17.


Can someone help me?

Alex

--------------------------------------------------------------
Alexander Dietz
Max Planck Institut fuer Kernphysik
Saupfercheckweg 1
Postfach 10 39 80
D-69029 Heidelberg

Phone: +49 6221 516 259

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