BankAccount

01: /**
02:    A bank account has a balance that can be changed by 
03:    deposits and withdrawals.
04: */
05: publicclassBankAccount
06: {
07: /**
08:       Constructs a bank account with a zero balance.
09:    */
10: publicBankAccount()
11: {
12: balance=0;
13: }
14: 
15: /**
16:       Constructs a bank account with a given balance.
17:       @param initialBalance the initial balance
18:    */
19: publicBankAccount(doubleinitialBalance)
20: {
21: balance=initialBalance;
22: }
23: 
24: /**
25:       Deposits money into the bank account.
26:       @param amount the amount to deposit
27:    */
28: publicvoiddeposit(doubleamount)
29: {
30: balance=balance+amount;
31: }
32: 
33: /**
34:       Withdraws money from the bank account.
35:       @param amount the amount to withdraw
36:    */
37: publicvoidwithdraw(doubleamount)
38: {
39: balance=balance-amount;
40: }
41: 
42: /**
43:       Gets the current balance of the bank account.
44:       @return the current balance
45:    */
46: publicdoublegetBalance()
47: {
48: returnbalance;
49: }
50: 
51: /**
52:       Transfers money from the bank account to another account
53:       @param amount the amount to transfer
54:       @param other the other account
55:    */
56: publicvoidtransfer(doubleamount,BankAccountother)
57: {
58: withdraw(amount);
59: other.deposit(amount);
60: }
61: 
62: privatedoublebalance;
63: }