Change strings to const char

benchmarks/barrel_ecal/scripts/emcal_barrel_energy_scan_analysis.cxx

@@ -30,8 +30,8 @@ void save_canvas(TCanvas* c, std::string label)
   std::string plot_name_png = dir + label + png;  
   std::string plot_name_pdf = dir + label + pdf;
 
-  c->SaveAs(plot_name_png);
-  c->SaveAs(plot_name_pdf)
+  c->SaveAs(plot_name_png.c_str());
+  c->SaveAs(plot_name_pdf.c_str());
 
   //c->SaveAs(std::format("results/{}.png",label));
   //c->SaveAs(std::format("results/{}.pdf",label));
@@ -162,7 +162,7 @@ std::vector<double> read_scanned_energies(std::string input_energies_fname)
         {
             scanned_energies.push_back(E);
         }
-        myfile.close();
+        E_file.close();
         return scanned_energies;
     }
     else
@@ -191,8 +191,8 @@ void emcal_barrel_electrons_energy_scan_analysis()
     TGraph gr_fsam_res(scanned_energies.size());
     for (const auto& E : scanned_energies) {
         auto [fsam, fsam_res] = extract_sampling_fraction_parameters(E);
-        gr_fsam.AddPoint(E,fsam);
-        gr_fsam_res.AddPoint(E,fsam_res);
+        gr_fsam.AddPoint(gr_fsam.GetN(),E,fsam);
+        gr_fsam_res.AddPoint(gr_fsam_res.GetN(),E,fsam_res);
     }
     TCanvas* c5 = new TCanvas("c5", "c5", 700, 500);
     c5->cd();