#ifndef _Dataproc
#define _Dataproc

#include <iostream>
#include <set>
using namespace std;

class Dataproc {
  public:
    Dataproc();
    void add_value(double d);
    double mean();
    int nentries();
    double variance();
    double stddev();
    double max();
    double min();
  protected:
    double total;
    double sqtotal;
    double n;
    double vmax;
    double vmin;
};
#endif