#include <iostream.h>  // for cout and cin
#include <iomanip.h>   // for setiosflags

class BankAccount {
public:
  void Withdraw(double);
  double GetBalance(void);
  void Deposit(double);
  BankAccount(double initial = 0);
protected:
  double balance;
private:
};

// ----------------------------------------------------------------------------

BankAccount::BankAccount(double initial)
{
  balance = initial;
}

// ----------------------------------------------------------------------------

void BankAccount::Deposit(double to_deposit)
{
  if (to_deposit >= 0) {
    balance += to_deposit;
  }
  else {
    cout << endl << endl << "Invalid transaction" << endl;
  }
}

// ----------------------------------------------------------------------------

double BankAccount::GetBalance(void)
{
  return balance;
}

// ----------------------------------------------------------------------------

void BankAccount::Withdraw(double to_withdraw)
{
  if ((to_withdraw >= 0) && (to_withdraw <= balance)) {
    balance -= to_withdraw;
  }
  else {
    cout << endl << endl << "Invalid transaction" << endl;
  }
}

// ============================================================================

#define FEE 20.0

class MoneyMarketAccount : public BankAccount {
public:
  void AddInterest(void);
  MoneyMarketAccount(double initial = 0, double interest = 0.025, double min_balance = 500);
protected:
  double interest_rate;
  double minimum_balance;
private:
};

// ----------------------------------------------------------------------------

void MoneyMarketAccount::AddInterest(void)
{
  if (balance >= minimum_balance) {
    balance *= (1.0 + interest_rate);
  }
  else {
    balance -= FEE;
  }
}

// ----------------------------------------------------------------------------

MoneyMarketAccount::MoneyMarketAccount(double initial, double interest, double min_balance)
  : BankAccount(initial)
{
  interest_rate = interest;
  minimum_balance = min_balance;
}

// =====================================================================================

void get_info(double &balance, double &interest_rate, double &min_balance)
{
  cout << "Please enter starting balance (XXX.XX format): ";
  cin >> balance;
  cout << "Please enter interest rate (0.XX format): ";
  cin >> interest_rate;
  cout << "Please enter minimum balance (XXX.XX format): ";
  cin >> min_balance;
}

// -----------------------------------------------------------------------------

void print_menu_read_choice(int &choice)
{
  int input = 0;

  while ((input < 1) || (input > 5)) {
    cout << endl << endl << "MENU" << endl;
    cout << "------------------------------" << endl;
    cout << "  1. Show account balance" << endl;
    cout << "  2. Deposit money" << endl;
    cout << "  3. Withdraw money" << endl;
    cout << "  4. Add interest" << endl;
    cout << "  5. QUIT" << endl << endl;
    cout << "  Your choice? ";
    cin >> input;
    if ((input < 1) || (input > 5)) {
      cout << endl << "INVALD CHOICE" << endl << endl;
    }
  }

  choice = input;
}

// -----------------------------------------------------------------------------

void show_account_balance(MoneyMarketAccount &Account)
{
  cout.precision(2);
  cout << setiosflags(ios::fixed);

  cout << endl << endl << "Balance is $" << Account.GetBalance() << endl;
}

// -----------------------------------------------------------------------------

void deposit(MoneyMarketAccount &Account)
{
  double ammount;

  cout << endl << endl << "How much to deposit (XXX.XX format)? ";
  cin >> ammount;
  Account.Deposit(ammount);
  show_account_balance(Account);
}

// -----------------------------------------------------------------------------

void withdraw(MoneyMarketAccount &Account)
{
  double ammount;

  cout << endl << endl << "How much to withdraw (XXX.XX format)? ";
  cin >> ammount;
  Account.Withdraw(ammount);
  show_account_balance(Account);
}

// -----------------------------------------------------------------------------

void add_interest(MoneyMarketAccount &Account)
{
  Account.AddInterest();
  show_account_balance(Account);
}

// -----------------------------------------------------------------------------

void process_choice(MoneyMarketAccount& Account, int choice)
{
// PRECONDITION: choice is between 1-5

  switch (choice) {
  case 1 : show_account_balance(Account); break;
  case 2 : deposit(Account); break;
  case 3 : withdraw(Account); break;
  case 4 : add_interest(Account); break;
  // just ignore case 5 - that's quit and there's nothing to do
  }
}

// -----------------------------------------------------------------------------

void main (void)
{
  double b, i, m;
  get_info(b,i,m);

  MoneyMarketAccount Account(b,i,m);

  int choice = 0;

  while (choice != 5) {
    print_menu_read_choice(choice);
    process_choice(Account, choice);
  }

  cout << endl << endl << "OK - done!" << endl << endl;
}