//
// Hints for project 6.7 p.316
//

PART I:
=======

- Create a class called LLBank with the following:

1- private fields:


   a constant integer MAX = 30;
   an array of LLBankCustomer called customers of size MAX
   an integer count = 0;

2- a constructor that sets up an initially empty bank using an foor loop.

   public LLBank()
   {
     .........
   }


3- a method Create() to create a new account.
   public void create ()
   {
      System.out.println ("CREATING A NEW CUSTOMER ACCOUNT");
      System.out.print ("Account number? ");
      int acct = Keyboard.readInt ();
      int index = findAccount(acct);
      if (index != -1)
         System.out.println ("Account number already in use.");
      else
      {
         System.out.print ("Name of new customer? ");
         String name = Keyboard.readString ();
         System.out.print ("Phone number of new customer? ");
         String phone = Keyboard.readString ();
         customers[count] = new LLBankCustomer(acct, name, phone, 0.0);         
         count++;
      }
   }

3- a method called deposit() to prompt for deposit information, 
   verify, and process.

   public void deposit ()
   {
      System.out.println ("MAKING A DEPOSIT");
      System.out.print ("Account number? ");
      int acct = Keyboard.readInt ();
      int index = findAccount(acct);
      if (index == -1)
         System.out.println ("Invalid account number.");
      else
      {
         System.out.print ("Amount of deposit? ");
         double amt = Keyboard.readDouble ();      
         if (amt > 0.0)
         {
            double update = customers[index].getBalance() + amt;
            customers[index].setBalance(update);
         }
         else
            System.out.println ("Invalid deposit amount.");
      }
   }

4- a method called withdraw to prompt for withdraw information, 
   verify, and process.

   public void withdraw ()
   {
	........
   }


5- a method interest() add interest to each existing accounts.

   public void interest ()
   {
      System.out.println ("ADDING INTEREST");
      for (int idx = 0; idx < count; idx++)
         customers[idx].setBalance(customers[idx].getBalance() * 1.03);
   }

6- a toString() that returns the information about the bank as a string.

   public String toString()
   {
	......
   }

7- a method findAccount (long target) that searches for 
   the specified account number. Returns -1 if not found.

   public int findAccount (long target)
   {
      int result = -1, scan=0;
      boolean found = false;

      while (scan < count && !found)
      {
         if (target == customers[scan].getAccount())
         {
            found = true;
            result = scan;
         }
         scan++;
      }
      
      return result;
   }
}


PART II:
========

create a class called LLBankCustomer with the following:

1- private filels:
   an account of type long
   2 Strings for name and phone
   a double for balance

2- constructor that sets up the customer with the specified information.

   public LLBankCustomer (long a, String n, String ph, double b)
   {
    ..............
   }

3- a mehod called getAccount() that returns the account number.

   public long getAccount ()
   {
      ..........
   }

4- a method that sets the balance as specified.

   public void setBalance (double newBalance)
   {
	...........
   }

5- a method that returns the current balance.

   public double getBalance ()
   {
     	........
   }

6- toString() that returns this customer's information as a string.

   public String toString ()
   {
	..........
   }
}


PART III:
=========

 1- Create a driver class LLBankDriver

 2- Exercises the methods of an LLBank object.

 3- Prompt the with a greetting.

 4- instantiate the LLBank class to create an object bank

 5- call create() to create an account 
 6- make a deposit  
 7- create another account by invoking create();
 8- make a deposit by invoking deposit();
 9- 7- create another account by invoking create();
10- make a deposit by invoking deposit();
11- make a withdrawal by invoking withdraw();
12- print the current status fo the bank object   
13- make another withdrawal by invoking withdraw();
14- add an intrest to the account by invoking interest();
15- print the final status fo the bank object