Why do you do?
foo->Set(foo->iEv,foo->nMod);
Remove this line and the script will work correctly.
The version 4 I/O subsystem supports variable length arrays of objects like
arrays of basic types. In this example:
Int_t nMod;
Bar **modules; //[nMod] : "nMod" of modules
Rene Brun
Carlos Muņoz Camacho wrote:
>
> Hi,
>
> I thought only variable size arrays of simple types were allowed (p.177 of
> User's Guide). Is this no longer a restriction ?
>
> Actually when I modify your read.C as follows to print out the data
> members of foo, it doesn't seem to work :
>
> {
> gSystem->Load("libfoo");
> Foo *foo=0;
> TFile f("xxxxx.root");
> tree.SetBranchAddress("foo",&foo);
> Int_t nentries=tree.GetEntries();
> Int_t nb=0;
> for (Int_t i=0;i<nentries;i++) {
> nb += tree.GetEntry(i);
> foo->Set(foo->iEv,foo->nMod);
> if(foo->nMod>0){
> cout<<foo->modules[0]->adc[0]<<endl;
> }
> foo->Set(0,0);
> }
> printf("nb=%d\n",nb);
> }
>
> Carlos
>
> On Mon, 14 Jun 2004, Rene Brun wrote:
>
> >Hi,
> >
> >See the tar file in attachement with your classes modified to run
> >correctly. I also added a small reader example.
> >
> >Rene Brun
> >
> >Yiqun Wang wrote:
> >>
> >> Hi, ROOTers:
> >>
> >> In Guide (3.10), I see one can have a variable-size array for a simple
> >> type (Int_t, Float_t, etc.). Can we do that for a compiled class? I tried
> >> the attached program, but got many errors (mismatched size) when reading
> >> the root file in an interactive session. Any suggestions?
> >>
> >> The motivation is to save disk space. Events I have may have interesting
> >> data in only one module, or multiple modules. If possible, I don't want to
> >> write all modules when some of them do not contain interesting data.
> >>
> >> To run my simplied example, untar the attached "test.tar.gz" in an empty
> >> directory, and run "make all". After that, run "./test" and generate the
> >> root file "xxxxx.root". This file has one tree "tree", which contains a
> >> branch "foo" (of class "Foo"). The leaf "modules" is the variable-size
> >> array of compiled class "Bar".
> >>
> >> Thanks!
> >>
> >> Yiqun Wang
> >>
> >> --------------------------------------------------------------------------------
> >> Name: test.tar.gz
> >> test.tar.gz Type: Unix Tape Archive (application/x-tar)
> >> Encoding: base64
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