#include "dataproc_good.h"
#include <iostream>
#include <math.h>
#include <cstdlib>
using namespace std;

Dataproc::Dataproc()
{
  n = 0;
  total = 0;
  sqtotal = 0;
}

void Dataproc::add_value(double d)
{
  if (n == 0) {
    vmax = d; 
    vmin = d;
  }
  total += d;
  sqtotal += (d*d);
  n++;
  if (d < vmin) vmin = d;
  if (d > vmax) vmax = d;
}

int Dataproc::nentries()
{
  return (int) n;
}

double Dataproc::min()
{
  if (n == 0) {
    cerr << "Dataproc::min() - Empty dataproc\n";
    exit (1);
  }
  return vmin;
}

double Dataproc::mean()
{
  if (n == 0) {
    cerr << "Dataproc::mean() - Empty dataproc\n";
    exit (1);
  }
  return total / n;
}

double Dataproc::variance()
{
  double m;

  m = mean();
  return (sqtotal/n - m*m);
}

double Dataproc::stddev()
{
  return sqrt(variance());
}

double Dataproc::max()
{
  if (n == 0) {
    cerr << "Dataproc::max() - Empty dataproc\n";
    exit (1);
  }
  return vmax;
}