[quote=“tayyebb”]No, for example we have this code :
{
TFile *f = new TFile(“myfile.root”);
TH1F * h1 = new TH1F(“h1”,“h1 title” , 100, 0, 4);
h1 = (TH1F*)f.Get([color=#FF0000]hist1[/color]);
h1->Draw();
}
I want to retrieve the name of the histogram that exists in the root file ?[/quote]
Start by getting the list of objects from the file
then iterate over the list and check if the objects are histograms
string name;
for(int i=0;i < list->Getsize();i++)
{
TObject *obj = (TObject*)list->At(i);
if(obj->ClassName() == "TH1")
{
TH1 *h = (TH1*)obj;
name = h->GetName();
}
else if(obj->ClassName() == "TH2")
{
TH2 *h = (TH2*)obj;
name = h->GetName();
}
}
which should give you the names. See root.cern.ch/root/roottalk/roottalk00/2885.html for the full example.