Lab Exam 23/11/2005 (14:00-16:00)

We want to realize a program for managing the accounts of clients of a bank. For each account, the following information is stored:

Part 1. Write a class Account that implements the following methods:

Account(String o, double p) : constructor that creates an object representing a bank account whose owner is o, whose penalty is p, whose initial balance is 0, and whose initial number of performed operations is 0.
String getOwner() : that returns the name of the owner of the bank account;
double getPenalty() : that returns the penalty of the bank account;
double getBalance() : that returns the balance of the bank account;
int getNumOp() : that returns the number of operations performed on the bank account;
void deposit(double a) : that deposits the amount of money a on the bank account, and increments the number of operations by 1;
void withdraw(double a) : that withdraws the amount of money a from the bank account, and increments the number of operations by 1; if after the withdrawal the balance is negative (either because it becomes negative, or because it already was negative), an additional amount equal to the penalty is subtracted from the balance;
String toString() : that returns a string with all the information about the bank account.

Part 2. Write a class UseAccount, client of Account, that contains the following public static method:

static double getMinPositiveBalance(Account a1, Account a2) : that, given two accounts a1 and a2, returns the minimum positive balance of a1 and a2. More precisely,
- if both accounts have a positive balance, the minimum of the two balances is returned;
- if only one of the two accounts has a positive balance, that balance is returned;
- if both accounts have a balance that is negative or 0, then 0 is returned.