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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