please how can i make a leaf contain a1,a2 and a3
and a1 contain aa1 and aa2
please i need your help
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TFile f(“ht.root”,“recreate”);
TTree* mytree = new TTree(“mytree”,“Test Tree”);
TH1D* h = new TH1D(“h”,“h”,10,0,1);
Double_t values[5] = {0,0,0,0,0};
TBranch *b2 = mytree->Branch(“b2”,values, “a/D:b:c:d:e”);
values[0] = 10; values[3] = -3.14; values[2] = 3;
mytree->Fill();
f.Write();