/** A bank account has a balance that can be changed by 
 *  deposits and withdrawals.
 *  METHOD STUBS ONLY, for now.
 */
class BankAccount { 
    
    /** Construct a bank account with a zero balance.
     */
    BankAccount() {   
        // Our real code will go here, but it's just a stub for now.
    }

    /** Construct a bank account with a given balance.
     * @param initialBalance the initial balance
     */
    BankAccount(double initialBalance) {   
        // Our real code will go here, but it's just a stub for now.
    }

    /** Deposit money into the bank account.
     * @param amount the amount to deposit
     */
    void deposit(double amount) {  
        // Our real code will go here, but it's just a stub for now.
    }

    /** Withdraw money from the bank account.
     * @param amount the amount to withdraw
     */
    void withdraw(double amount) {   
        // Our real code will go here, but it's just a stub for now.
    }

    /** Get the current balance of the bank account.
     * @return the current balance
     */
    double getBalance() {   
        // Our real code will go here, but it's just a stub for now.
        return -99.99;
    }
  
}