int type = 0;
const char * h1dir = 0;

std::cout << "Run h1 analysis " << std::endl;

TChain chain("h42");

if (h1dir) {
   gSystem->Setenv("H1",h1dir);
}
else
   gSystem->Setenv("H1","http://root.cern/files/h1/");


std::cout << "Creating the chain" << std::endl;

chain.SetCacheSize(20*1024*1024);
chain.Add("$H1/dstarmb.root");
chain.Add("$H1/dstarp1a.root");
chain.Add("$H1/dstarp1b.root");
chain.Add("$H1/dstarp2.root");

TString selectionMacro = gSystem->GetDirName(__FILE__) + "/h1analysis.C";

if (type == 0)
   chain.Process(selectionMacro);
else if (type == 1)   {
   // use AClic ( add a + at the end
   selectionMacro += "+";
   chain.Process(selectionMacro);
}
else if (type == 2) {
   chain.Process(selectionMacro,"fillList");
   chain.Process(selectionMacro,"useList");
}