cashregister.java

java编的售糖程序

//class cashRegister

public class CashRegister

{
    private int cashOnHand;   //variable to store the cash
                              //in the register

        //Constructor with parameters
        //To set the cash in the register to a specific amount
        //Postcondition: cashOnHand = cashIn;
    public CashRegister(int cashIn)
    {
        if(cashIn >= 0)
         cashOnHand = cashIn;
        else
             cashOnHand = 500;
    }

        //Default constructor with parameters
        //To set the cash in the register 500 cents
        //Postcondition: cashOnHand = 500;
    public CashRegister()
    {
         cashOnHand = 500;
    }

        //Method to show the current amount in the cash register
      //Postcondition: The value of the instance variable
        //               cashOnHand is returned
    public int currentBalance()
    {
      return cashOnHand;
    }

        //Method to receive the amount deposited by
        //the customer and update the amount in the register.
        //Postcondition: cashOnHand = cashOnHand + amountIn
    public void acceptAmount(int amountIn)
    {
        cashOnHand = cashOnHand + amountIn;
    }
}