The Bank

This is your typical bank that has customers with accounts -- customers can deposit and withdraw money from these accounts. 

Here are the requirements:

1)  In your file that has main defined, you'll need to open two file streams for reading (the  new customers and the daily transactions) and a file stream for writing (your grade output).  Naturally, we will edit these file names when we grade your program.  You'll need to pass handles to these input/output file streams to functions/classes as necessary.  We need you to:

1. First, read and handle all the transactions in the new customers input file. 
2. Then, read and handle all the transactions in the daily transactions input file.   

2)  Here's the format of a transaction in the  new customers input file with expected response:

• firstName lastName accountNumber checkDeposit savingDeposit 
• This is the bank adding a new customer.  
• firstName and lastName  are (naturally) the name of the customer.  They will be some kind of string (you choose the implementation).
• accountNumber  is their assigned account number -- it is an integer.  This number must be unique (no other customers may have this account number).
• checkDeposit  is the amount the customer is opening their checking account with.  They must open their checking account with at least $5.  This number is a real number.
•  savingsDeposit is the amount the customer is opening their savings account with.  They must open their checking account with at least $1.  This number is a real number.
•  example:
         Laurie Williams 0921 5.50 1.50
  If this addition is successful, print a "success" message to the screen and to the outfile:
  Laurie Williams added account number 0912.
  
  If this addition is not successful (based on the conditions above), print a "failure message to the screen and the outfile.
  Laurie Williams not added.  Y
• where Y tells the reason Laurie Williams was not added.
   
• A typical new customer input file might look like:
  Laurie Williams 0921 5.50 1.50
  Danny Williams 0126 1.50 5.50
  Christopher Williams 0916 5.01 1.01
  Kimberly Williams 0916 5.01 1.01
  Brian Williams 0112 100 100
   

3)  Here's the transactions that must be handled from the daily transactions input file.  Two things to note:  1)  These are things that both a customer and the bank would do on an ongoing basis; 2)  The format of all the transactions below is :  string string integer real. If any of the fields are not necessary for that particular kind of transaction, it will have a 0 (zero) placeholder.

• deposit savings accountNumber amount
  deposit checking accountNumber amount 
• This is a customer making a deposit to their savings or checking account
• If the accountNumber is valid, print a message to the screen and to the outfile:
• amount deposit to the savings/checking account of firstName lastName new balance = Y
• where amount is the amount deposited.  
• firstName and lastName are the names for accountNumber
• Y is the new balace in the account
• If the accountNumber is not valid,  print a message to the screen and to the outfile:
• Invalid account number accountNumber
  
  
  
  
• withdraw savings accountNumber amount
  withdraw checking accountNumber amount
• This is a customer, withdrawing money (in person)
• If the accountNumber is valid and the person has enough money in their account, print a message to the screen and to the outfile:
• amount withdrawn from the savings/checking account of firstName lastName new balance = Y
• where amount is the amount deposited.  
• firstName and lastName are the names for accountNumber
• Y is the new balance in the account
• If the accountNumber is not valid or the person does not have enough money (no money is withdrawn),  print a message to the screen and to the outfile:
• Invalid account number accountNumber
  or not enough funds for firstName lastName in checking/savings account balance = Y
• check 0 accountNumber amount 
• This is a customer's check, trying to clear the bank.
  If the accountNumber is valid and the person has enough money in their account, print a message to the screen and to the outfile:
• amount withdrawn from the savings/checking account of firstName lastName via check new balance = Y
• where amount is the amount deposited.  
• firstName and lastName are the names for accountNumber
• Y is the new balace in the account
• If the accountNumber is not valid,  print a message to the screen and to the outfile:

§         §         Invalid account number accountNumber

• If the person does not have enough funds, add to the person's overdraft account the balance of the check not in the checking account.  Add a $15 service charge to the overdraft account.  Print a message to the screen and to the outfile: 
• x added to overdraft account for firstName lastName.  New balance = y
• where x is the amount that could not be covered by the checking account and y is the balance in the person's overdraft account.
  
  
  
• pay overdraft accountNumber amount
• This is a customer paying off their overdraft account
• If the accountNumber is valid and the person has an overdraft balance of at least amount, print a message to the screen and to the outfile:
• X paid to overdraft account of firstName lastName new balance = Y
• where amount is the amount deposited.  
• firstName and lastName are the names for accountNumber
• Y is the new balance in the account
• If the accountNumber is not valid or the person is trying to pay off more than their overdraft balance,  print a message to the screen and to the outfile:
• Invalid account number accountNumber
  or paying too much for overdraft account for firstName lastName,  overdraft balance = Y

• balance savings accountNumber 0
  balance checking accountNumber 0
  balance overdraft accountNumber 0 
• This is customer obtaining their balance
• If accountNumber is valid, print message to screen and to outfile:
• Savings/Checking/Overdraft balance for firstName lastName is X 
• If not a valid accountNumber, print a message to the screen and to the outfile:
• Invalid account number:  accountNumber
  
  
  

·         ·         close 0 accountNumber 0

• This is the bank closing a person's account
• If the account is valid, print message to screen and to outfile:
• account closed for firstName lastName
• If the accountNumber is not valid,  print a message to the screen and to the outfile:

§         §         Invalid account number accountNumber

·         ·         total savings 0 0
total checking 0 0
total overdraft 0 0

o        o        This is the bank computing the dollars in all savings/checking/overdraft accounts

o        o        Print a message to the outfile and to the screen giving the total dollars in all accounts

·         ·         average savings 0 0
average checking 0 0
average overdraft 0 0

o        o        This is the bank computing the average dollars per customer in savings/checking/overdraft accounts

o        o        Print a message to the outfile and to the screen giving the total dollars in all accounts

 

• points please x
• This is you getting the points you deserve.
• A message should be sent to the user (TA) and it should accept a character input.
• Do you want to add x points?
• If a 'Y' or a 'y' is entered, add these points to a running sum.  And, print to the screen and to the outfile:
• Points:  x

• Else, print a message to the screen and to the outfile:
• Points:  0

quit 0 0

• Quits the transactions:
• Print a message to the screen and to the outfile containing the running sum from points (above):
• Total points x

• A typical daily transactions input file might look like:
  deposit savings 0916 100
  withdraw checking 0112 10
  withdraw savings 0916 1100
  check 0 0916 10
  balance checking 0916 0
  points please 3
  quit 0 0

1 Flow of Events for the CustomerTransaction Use Case

1.1 Preconditions 
 None.

1.2 Main Flow

This use case begins when a new or established customer performs a transaction at The Bank.  If the transaction is: 

• Open New Account, the Verify Account Number (S-1) subflow is performed, followed by the S-2 Open New Account subflow.  The use case begins again.
• Deposit to Savings, the Verify Account Number (S-1) subflow is performed, followed by the S-3 Deposit to Savings subflow.  The use case begins again.
• Deposit to Checking, the Verify Account Number (S-1) subflow is performed, followed by the S-4 Deposit to Checking subflow.  The use case begins again.
• Withdraw from Savings, the Verify Account Number (S-1) subflow is performed, followed by the S-5  Withdraw from Savings subflow.  The use case begins again. 
• Withdraw from Checking, the Verify Account Number (S-1) subflow is performed, followed by the S-6 Withdraw from Checking subflow.  The use case begins again. 
• Process Check, the Verify Account Number (S-1) subflow is performed, followed by the S-7  Process Check subflow.  The use case begins again. 
• Pay Overdraft, the Verify Account Number (S-1) subflow is performed, followed by the S-8  Pay Overdraft subflow.  The use case begins again.  
• Get Savings Balance, the Verify Account Number (S-1) subflow is performed, followed by the S-9, Savings Balance.  The use case begins again. 
• Get Checking Balance, the Verify Account Number (S-1) subflow is performed, followed by the S-10, Checking Balance.  The use case begins again. 
• Get Overdraft Balance, the Verify Account Number (S-1) subflow is performed, followed by the S-11, Overdraft Balance.  The use case begins again. 
• QUIT, the use case ends
  
  

1.3 Subflows

            S-1 Verify Account Number

Execute the Verify Account Number subflow of the Account Repository use case.  Return a message indicating whether the specified account number is among the set of bank customers.

S-2 Open New Account

If there are no current accounts with the new account number (E-1), add new customer account (E-2, E-3)

S-3 Deposit to Savings

If the account number is valid (E-4), add amount to the customer’s savings balance (E-8).

S-4 Deposit to Checking

If the account number is valid (E-4), add amount to the customer’s checking balance (E-8)..

.

S-5 Withdraw from Savings

If the account number is valid (E-4), execute the Report savings balance subflow of the Account use case.  Ensure the amount the customer is attempting to withdraw is less than or equal to the savings balance(E-5).  Subtract amount from balance.

S-6 Withdraw from Checking

If the account number is valid (E-4), execute the Report checking balance subflow of the Account use case.  Ensure the amount the customer is attempting to withdraw is less than or equal to the checking balance(E-5).  Subtract amount from balance.

S-7 Process Check

If the account number is valid (E-4), execute the Report checking balance subflow of the Account use case.  Ensure the amount of the check is less or equal to than the checking balance(E-6).  Subtract amount from balance.

S-8 Pay Overdraft

If the account number is valid (E-4), execute the Report overdraft balance subflow of the Account use case.  Ensure the overdraft payment is for an amount less than or equal to the overdraft balance (E-7).  Subtract the amount from balance.

S-9 Savings Balance

If the account number is valid (E-4), execute the Report savings balance subflow of the Account use case.

S-10 Checking Balance
If the account number is valid (E-4), execute the Report checking balance subflow of the Account use case. 

S-11 Overdraft Balance

If the account number is valid (E-4), execute the Report overdraft balance subflow of the Account use case. 

1.4 Alternative Flows

            E-1:  The account number is already among the set of customer account.  Invalid.

            E-2:  The new customer is trying to open an account with less than a $5 deposit to checking

            E-3:  The new customer is trying to open an account with less than a $1 deposit to savings

            E-4:  The account number is not among the set of customer accounts.  Invalid.

            E-5:  The customer is trying to withdraw more than they have in account.

            E-6:  The check is for an amount greater than amount in checking account.  Increment overdraft account for the difference + $15.

            E-7:  The overdraft payment is for an amount greater than the overdraft balance.  Increment.

            E-8:  The amount to deposit is negative

2 Flow of Events for the Bank Transactions Use Case

2.1 Preconditions 
The Initialize subflow of the Account Repository use case has been executed.

2.2 Main Flow

This use case begins when The Bank performs a transaction.  If the transaction is:

• Close Account, the Verify Account Number (S-1) subflow is performed, followed by the S-2 Close Account subflow.  The use case begins again.
• Total Savings,  the S-3 Total Savings subflow is performed.  The use case begins again.
• Total Checking,  the S-4 Total Checking subflow is performed.  The use case begins again.
• Total Overdraft,  the S-5 Total Overdraft subflow is performed.  The use case begins again.

• Average Savings,  the S-6 Average Savings subflow is performed.  The use case begins again.
• Average Checking,  the S-7 Average Checking subflow is performed.  The use case begins again.
• Average Overdraft,  the S-8 Average Overdraft subflow is performed.  The use case begins again.
• QUIT, the use case ends.
  
  
  

2.3 Subflows

            S-1 Verify Account Number

Execute the Verify Account Number subflow of the Account Repository use case.  Return a message indicating whether the specified account number is among the set of bank customers.

S-2 Close Account

Remove the customer account from the set of customer accounts.

S-3 Total Savings

Execute the Report Savings Balance of the Account Repository use case to obtain the balance in all savings accounts.

S-4 Total Checking

Execute the Report Checking Balance of the Account Repository use case to obtain the balance in all checking accounts.

S-5 Total Overdraft

Execute the Report Overdraft Balance of the Account Repository use case to obtain the balance in all overdraft accounts.

S-6 Average Savings

Execute the Report Savings Balance of the Account Repository use case to obtain the balance in all savings accounts.   Execute the Report Number of Customers subflow of the Account Repository use case to obtain the number of bank customers.  Divide the balance in all savings ccounts by the number of customers (E-1) to obtain the average savings balance.

S-7 Average Checking

Execute the Report Checking Balance of the Account Repository use case to obtain the balance in all checking accounts.   Execute the Report Number of Customers subflow of the Account Repository use case to obtain the number of bank customers.  Divide the balance in all checking accounts by the number of customers (E-1) to obtain the average checking balance.

S-8 Average Overdraft

Execute the Report Overdraft Balance of the Account Repository use case to obtain the balance in all overdraft accounts.   Execute the Report Number of Customers subflow of the Account Repository use case to obtain the number of bank customers.  Divide the balance in all overdraft accounts by the number of customers (E-1) to obtain the average overdraft balance.

2.4 Alternative Flows

            E-1 There are no customers in the bank.  Protect from division by zero

3 Flow of Events for the Account Repository Use Case

3.1 Preconditions 
none

3.2 Main Flow

The Account Repository is initialized (S-6).  This use case traverses the set of customer accounts to verify account numbers (S-1) and report savings balances (S-2), checking balances (S-3), overdraft balances (S-4), and the number of customer accounts (S-5)

3.3 Subflows

            S-1 Verify Account Number

Query each bank account via the Report account number subflow of the Account use case.  Send a message indicating whether the specified account number has been found among the set of customer accounts.

S-2 Report Total Savings Balance

For each bank account, execute the Report Savings Balance subflow of the Account use case.  Accumulate the sum of all savings balances.  Return a message with the total in all savings accounts.

S-3 Report Total Checking Balance

For each bank account, execute the Report Checking Balance subflow of the Account use case.  Accumulate the sum of all checking balances.  Return a message with the total in all checking accounts.

S-4 Report Total Overdraft Balance

For each bank account, execute the Report Overdraft Balance subflow of the Account use case.  Accumulate the sum of all overdraft balances.  Return a message with the total in all overdraft accounts.

S-5 Report Number of Customers

Send a message indicating the number of bank customers.

S-6 Initialize

An empty set of bank customers is initialized.

3.4 Alternative Flows

4 Flow of Events for the Account Use Case

4.1 Preconditions 
none

4.2 Main Flow

The account maintains its account number and balance status.  The account number, savings, checking and overdraft balances can be reported (S-1, S-2, S-3, S-4).  The savings, checking, and overdraft balances can be updated (S-5, S-6, S-7).   

4.3 Subflows

            S-1 Report account number

Send a message indicating the account number.

S-2 Report savings balance

Send a message indicating the savings account balance.

S-3 Report checking balance

Send a message indicating the checking account balance.

S-4 Report overdraft balance

Send a message indicating the overdraft account balance.

S-5 Update savings balance

Change the value of the savings account balance.

S-6 Update checking balance

Change the value of the savings account balance.

S-7 Update overdraft balance

Change the value of the savings account balance.

4.4 Alternative Flows