Resolve "pi0 resolution for ECal barrel"

Closes #19 (closed)

benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx

@@ -133,7 +133,7 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
 
   // Set sampling Fraction, ideally this will be taken from a json file 
   samp_frac = hfsam -> GetMean();
-  printf("The sampling fraction mean is %f\n", samp_frac);
+  cout << "The sampling fraction mean is " << samp_frac << endl;
 
   auto d2 = d1.Define("dE",     eResol,     {"Esim","Ethr"})
               .Define("dE_rel", eResol_rel, {"Esim","Ethr"})