class DrinksMachineF implements DrinksMachine,BeverageMachine
{
// A machine that serves hot and cold drinks

 protected int balance,price;

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

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

 public int showMoney()
 {
  return balance;
 }

 public int showPrice()
 {
  return price;
 }

 public String pressCoke()
 {
  if(balance<price)
     return "Nothing";
  else
     {
      int change=balance-price;
      balance=0;
      return "Coke + "+change+"p";
     }
 }

 public String pressFanta()
 {
  if(balance<price)
     return "Nothing";
  else
     {
      int change=balance-price;
      balance=0;
      return "Fanta + "+change+"p";
     }
 }

 public String pressTea()
 {
  if(balance<price)
     return "Nothing";
  else
     {
      int change=balance-price;
      balance=0;
      return "Tea + "+change+"p";
     }
 }

 public String pressCoffee()
 {
  if(balance<price)
     return "Nothing";
  else
     {
      int change=balance-price;
      balance=0;
      return "Coffee + "+change+"p";
     }
 }

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

}