public class DataSet
{
public DataSet()
{
 sum = 0;
 count = 0;
}

public void add(Measurable x)
{
 sum = sum + x.getMeasure();
 if(count == 0 || maximum.getMeasure() < x.getMeasure() ) maximum = x;
 count++;
}


public double getAverage()
{

 if(count == 0 ) return 0;
 else return sum/count;
}

public Measurable getMaximum()
{
  return maximum;
}

private double sum;
private Measurable maximum;
private int count;

}