#include "glass_2.h"

//
// Implementation of Member Functions
//

Glass::Glass(int the_volume)
{
  volume = the_volume;
  filled = 0;
}

Glass::~Glass()
{}

int Glass::fill(int quantity)
{
  int free = volume - filled;
  if (quantity > free) 
  {
    filled = volume;
    return free;
  }else{
    filled += quantity;
    return quantity;
  }
}

int Glass::drink(int quantity)
{
  int to_drink;
  if (quantity > filled)
  {
    filled = 0;
    return to_drink;
  }else{
    filled -= quantity;
    return quantity;
  }
}

int Glass::empty()
{
  int to_spill;
  filled = 0;
  return to_spill;
}

int Glass::content()
{
  return filled;
}