/* Simple bank account using classes and objects. */

#include <iostream>
using namespace std;

class Account {

public:
  Account();
  Account(string fname, string lname, int number, double balance);
  void Set(string fname, string lname, int number, double balance);
  void Deposit(double amount);
  void Withdrawal(double amount);
  double Balance();
  void PrintInfo();
private:
  string m_firstName;
  string m_lastName;
  int    m_number;
  double m_balance;
};

int main() {

  // Create and initialize Account object
  Account act("Chris", "Marron", 14314, 0.0);

  // Good programmer!  Uses defined functions
  // that include error checking

  act.PrintInfo();   

  act.Deposit(100.0);   // Deposit(act, 100.0) for struct

  cout << "Balance is " << act.Balance() << endl;

  act.Withdrawal(150.0);

  cout << "Balance is " << act.Balance() << endl << endl;

  // Bad programmer!  Bypasses error checking
  // This doesn't work since balance is declared 'private'

  act.m_balance -= 150.0;

  cout << "Balance is " << act.Balance() << endl;

  return 0;
}

Account::Account() {
  // default constructor - do nothing
}

Account::Account(string fname, string lname, int number, double balance) {
  m_firstName = fname;
  m_lastName = lname;
  m_number = number;

  if (balance >= 0.0)
    m_balance = balance;
  else
    m_balance = 0.0;
}
  
void Account::Set(string fname, string lname, int number, double balance) {
  m_firstName = fname;
  m_lastName = lname;
  m_number = number;

  if (balance >= 0.0)
    m_balance = balance;
  else
    cerr << "Set: initial balance must be >= 0." << endl;
}

void Account::Deposit(double amount) {

  // could add loging, etc.

  if (amount > 0.0) 
    m_balance += amount;
  else
    cerr << "Deposit: amount must be positive." << endl;
}    

void Account::Withdrawal(double amount) {

  // could add loging, etc.

  if (amount > 0.0) 
    if (amount <= m_balance)
      m_balance -= amount;
    else
      cerr << "Withdrawal: insufficient funds." << endl;
  else
    cerr << "Withdrawal: amount must be positive." << endl;
}    

double Account::Balance() {

  // could add loging, etc.

  return m_balance;
}

void Account::PrintInfo() {
  cout << "Account number: " << m_number << endl;
  cout << "Owner: " << m_firstName << " " << m_lastName << endl;
  cout << "Balance: " << m_balance << endl << endl;
}