91   double _last;

    91   double _last;

    92   double _maximum; // keep track of maximum value

    92   double _maximum; // keep track of maximum value

    93 

    93 

    94 public:

    94 public:

    95   NumberSeq(double alpha = DEFAULT_ALPHA_VALUE);

    95   NumberSeq(double alpha = DEFAULT_ALPHA_VALUE);

    97 

    96 

    98   virtual void add(double val);

    97   virtual void add(double val);

    99   virtual double maximum() const { return _maximum; }

    98   virtual double maximum() const { return _maximum; }

   100   virtual double last() const { return _last; }

    99   virtual double last() const { return _last; }

   101 

   100