//This program uses the procedural approach
//to demonstrate the BankAccount problem.
//Author: A. Guercio - Feb.18, 2008
#include <iostream>
#include <stdlib.h>
using namespace std;

//list of the functions used
//open creates an account and returns the number of the account
int open(double amount);

//it adds the amount to deposit to the balance and returns the new balance
double deposit(double abalance, double amount);

//it subtracts the amount to withdraw to the balance and returns the new balance
double withdraw(double abalance, double amount);

//it computes the interest of the account and returns the new balance
double compute_interest(double abalance, const double ARATE);

//it adds the current balance to the interest matured
double update(double abalance, double ainterest);

//here starts the main
int main()
{int account, double balance, double interest; 
const double RATE = 0.05;
cout << "How much money to you want to start the account with? " << endl;
cout << "Insert the amount here: $";
cin >> balance;

//create an account and add some money in it
account = open(balance);
cout << "The number of the account just created is " << account << endl;
cout << "and has  " << balance << " dollars in it." << endl;

//deposit money in the account
balance = deposit(balance, 1000);
cout << "The account has  " << balance << " dollars in it now." << endl;

//withdraw money from the account
balance = withdraw(balance, 300);
cout << "The account has  " << balance << " dollars in it now." << endl;

//compute the interest you the account
interest = compute_interest(balance, RATE);
cout << "The interest on your account is " << interest << endl;

//update the balance with the interest 
balance = update(balance, interest);
cout << "The account has  " << balance << " dollars in it now." << endl;

	return 0; 
} // end of main


//The functions inmplementation starts here.
int open(double abalance)
//generate a random number for the new account
{if (abalance > 0)
 return rand();
else return 0;}

double deposit(double abalance, double amount)
//deposit the amount
{return (abalance + amount);
}

double withdraw(double abalance, double amount)
//withdraw the amount
{return (abalance - amount);
}

double compute_interest(double abalance, const double ARATE)
//compute the interest
{return (abalance * ARATE);
}

double update(double abalance, double ainterest)
//update the balance with the interest
{abalance = abalance + ainterest;
 return abalance;
}