#ifndef _Dataproc
#define _Dataproc

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

class Dataproc {
  public:
    void add_value(double d);
    double mean();
    int nentries();
    double variance();
    double stddev();
    double max();
    double min();
  protected:
    vector <double> v;
};
#endif