class SimpleDrinksMachine implements DrinksMachine
{
 private int balance,price;

 public SimpleDrinksMachine(int p)
 {
  price=p;
 }

 public void addMoney(int pence)
 {
  balance+=pence;
 }

 public int showMoney()
 {
  return balance;
 }

 public int showPrice()
 {
  return price;
 }

 public String pressCoke()
 {
  int change=balance-price;
  balance=0;
  return "Coke + "+change+"p";
 }

 public String pressFanta()
 {
  int change=balance-price;
  balance=0;
  return "Fanta + "+change+"p";
 }

 public void changePrice(int newprice)
 {
  price=newprice;
 }

}