https://github.com/root-project/root
Tip revision: 432cba63e3322322a4347c28407c55a535f9f9b7 authored by Unknown Author on 11 March 2003, 16:59:48 UTC
This commit was manufactured by cvs2svn to create tag 'v3-05-03'.
This commit was manufactured by cvs2svn to create tag 'v3-05-03'.
Tip revision: 432cba6
cernbuild.C
// example of macro to read data from an ascii file and
// create a root file with a Tree.
// see also a variant in staff.C
// Author: Rene Brun
void cernbuild() {
Int_t Category;
UInt_t Flag;
Int_t Age;
Int_t Service;
Int_t Children;
Int_t Grade;
Int_t Step;
Int_t Hrweek;
Int_t Cost;
Char_t Division[4];
Char_t Nation[3];
//The input file cern.dat is a copy of the CERN staff data base
//from 1988
FILE *fp = fopen("cernstaff.dat","r");
char line[80];
TFile f("cernstaff.root","RECREATE");
TTree *tree = new TTree("T","CERN 1988 staff data");
tree->Branch("Category",&Category,"Category/I");
tree->Branch("Flag",&Flag,"Flag/i");
tree->Branch("Age",&Age,"Age/I");
tree->Branch("Service",&Service,"Service/I");
tree->Branch("Children",&Children,"Children/I");
tree->Branch("Grade",&Grade,"Grade/I");
tree->Branch("Step",&Step,"Step/I");
tree->Branch("Hrweek",&Hrweek,"Hrweek/I");
tree->Branch("Cost",&Cost,"Cost/I");
tree->Branch("Division",Division,"Division/C");
tree->Branch("Nation",Nation,"Nation/C");
while (fgets(&line,80,fp)) {
sscanf(&line[0],"%d %d %d %d %d",&Category,&Flag,&Age,&Service,&Children);
sscanf(&line[32],"%d %d %d %d %s %s",&Grade,&Step,&Hrweek,&Cost,Division,Nation);
tree->Fill();
}
tree->Print();
tree->Write();
fclose(fp);
}