int maketree()
{
	const Int_t maxmul=8;
	Int_t mul;
	Float_t Eg[maxmul];
	
	TTree *t = new TTree("t","mytree");
	TBranch *b = t->Branch("mul",&mul,"mul/I");
	TBranch *b1 = t->Branch("Eg",Eg,"Eg[mul]/F");
	
	for (Int_t i=0; i<10000; i++) {
		Int_t mul1 = int(gRandom->Rndm()*10);
		mul = mul1%4;
		for (Int_t j=0; j<mul; j++) {
			Eg[j]=gRandom->Rndm()*1000;
		}
		t->Fill();
	}
	f = new TFile("treehouse.root","recreate");
	t->Write();
	f->Close();
	return 1;
}