<?php
// Definition of the class UnitCounter
//
class UnitCounter
{
// Member variables
var $units = 0;
var $weightPerUnit = 1.0;
// Add $n to the total number of units, default $n to 1
function add($n = 1)
{
$this->units = $this->units + $n;
}
// Member function that calculates the total weight
function totalWeight()
{
return $this->units * $this->weightPerUnit;
}
}
?>