// A bank account class
#include "stdafx.h"
#include <iostream>
#include <string>

class Account
{
  // private members are those that cannot be changed directly by the owner
  // of the account. The bank has access to them and may change them.
  private:
    double balance;
    std::string name;
    // the interest rate both constant, and static. This means the value
    // is the same (const) for all instances of the class, so we only need 
    // one version (static)
    static const double interestRate;
  public:
    // public access 
    // here the public or account user can change the 
    // balance only by depositing cash (using deposit function)
    // or by withdrawing cash (using withdraw)
    void withdraw(double amount) // withdraw cash
    { balance = balance - amount;}
    void deposit(double amount) // deposit cash
    { balance = balance + amount;}
    void endYear() // pay interest at the end of the Year
    { balance = (1+interestRate)*balance; }
    void printBalance()
    { std::cout << name <<"'s balance is " << balance << " \n"; }
    // constructor function, can't use defaults now
    // as we need to specify a name  when we open the account
    Account(int initial_balance,std::string name_)
    { balance = initial_balance; name=name_;}

};

// static members must be initialised outside the class
const double Account::interestRate=0.05;

int main()
{
  // create an account, must specify initial balance and name
  Account currentAccount(0.,"Paul Johnson");
  for(int i=1;i<=10;i++)
  {
    // deposit some money
    currentAccount.deposit(100);
    // pay interest
    currentAccount.endYear();
  }
  // display balance
  currentAccount.printBalance();
}