compile
./Make.sh ZTT_XSection.cc
run
./ZTT_XSection.exe TTJets.root root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/TTbar.root
./ZTT_XSection.exe WJetsToLNu.root root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/WJetsToLNu_Inc.root
./ZTT_XSection.exe SingleMu.root root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/SingleMuon.root
./ZTT_XSection.exe DYJetsToTauTau.root root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/DYJetsToLL_M-50_Inc.root 1 1
./ZTT_XSection.exe DYJetsToLL.root root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/DYJetsToLL_M-50_Inc.root 1 0
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/DYJetsToLL_M-50_Inc.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/SingleElectron.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/SingleMuon.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/TTbar.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/WJetsToLNu_Inc.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/WW.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/WZ.root
root://131.225.204.161:1094//store/user/cmsdas/2019/long_exercises/ZTauTau/ZZ.root