{

    TH1 *h1 = new TH1D("h1", "1D Histo", 10,0,10);

    h1->Fill(4);
    h1->Fill(1);
    h1->Fill(1);
    h1->Fill(5);
    h1->Fill(8);

     h1->Draw();

    TFile *save = new TFile("savehisto.root","recreate");   //creation of a new .root file to save the histo
      save->ls();
     h1->Write();

    save->Close();

    TFile *save = new TFile("savehisto.root");   //opens the root file
     save->ls();

          TH1D *h11 = (TH1D*)save->Get("h1");

        float bincenter, value;

        ofstream myfile;
        myfile.open ("histogramtxt.txt");
        myfile << "bincenter value\n";

      for (int idx=1; idx<=h11->GetNbinsX(); ++idx) {

        bincenter = h11->GetBinCenter(idx);
        value = h11->GetBinContent(idx);
        cout << bincenter << " " << value << endl;   //prints on the screen
        myfile << bincenter << " " << value << "\n"; //writes to the input file
}

       myfile.close();
}