An effective FD corretion

[u/mrichter/AliRoot.git] / TEvtGen / EvtGenBase / EvtSimpleRandomEngine.hh

//--------------------------------------------------------------------------
//
// Environment:
//      This software is part of the EvtGen package developed jointly
//      for the BaBar and CLEO collaborations.  If you use all or part
//      of it, please give an appropriate acknowledgement.
//
// Copyright Information: See EvtGen/COPYRIGHT
//      Copyright (C) 1998      Caltech, UCSB
//
// Module: EvtGen/EvtRandom.hh
//
// Description:Class to generate random numbers. Single member
//             function random is expected to return a random
//             number in the range ]0..1[.
//
// Modification history:
//
//    RYD     December 25, 1999         Module created
//
//------------------------------------------------------------------------

#ifndef EVTSIMPLERANDOMENGINE_HH
#define EVTSIMPLERANDOMENGINE_HH

class EvtSimpleRandomEngine{

public:

    EvtSimpleRandomEngine(){
	_next=1;
    }

    void reset() {
	_next=1;
    }

    virtual double random();

private:

  unsigned long int _next;

};

#endif