Reading data from a txt file and storing in a tree

Time walk correction/MyTree.C

+void MyTree(){
+
+  std::ifstream Energy_file("Energy_table.dat");
+  double Ecol1,Ecol2,Ecol3,Ecol4;
+   
+  
+  TFile* Efile = new TFile("Energy_table.root","recreate");
+  TTree* ETree = new TTree("ETree","Energy tree");
+
+  ETree->Branch("Ecol1",&Ecol1,"Ecol1/D");
+  ETree->Branch("Ecol4",&Ecol4,"Ecol4/D");
+
+  while(1){
+    Energy_file >> Ecol1 >> Ecol2 >>Ecol3 >> Ecol4;
+
+    if(Energy_file.eof())break;
+
+    ETree->Fill();
+  }
+
+  Efile->Write();
+
+}