//Bank Account Class (with Constructors)
//Program to demonstrate the class BankAccount.
//Author: A. Guercio - Feb.18, 2008
#include <iostream>
#include <stdlib.h>
using namespace std;

//Class for a bank account starts here:
class BankAccount
{
public:
	//first we define the constructors
	//constructor number 1
    BankAccount(double amount, double rate)
	//Initializes the account balance to the amount
    //initializes the interest rate to rate percent.
	{if ((amount < 0) || (rate < 0))
		{
        cout << "Illegal values for money or interest rate.\n";
        exit(1);
		}
     balance = amount;
	 interest = 0.0;
	 number = rand();
     interest_rate = rate;
	}
    
	//constructor number 2
    BankAccount( )
    //Initializes the account balance to $0.00 and the interest rate to 0.0%.
	{balance = 0.0;
	 interest = 0.0;
     interest_rate = 0.0;
	}

	//here starts the list of the methods of the class each with its implementation
	void deposit(double amount)
    //The amount is added to the balance of the account.
	{ balance = balance + amount;
	}

	void withdraw(double amount)
    //The amount is subtracted to the balance of the account.
	{ balance = balance - amount;
	}

	void compute_interest()
	//Computes the interest of the account
	{interest = balance * interest_rate;
	}

	void update()
	//Updates the current account with the interest
	{ balance = balance + interest;
	}

	int get_number()
	//Returns the number of the current account.
	{ return number;
	}
	
	double get_interest()
	//Returns the interest of the current account.
	{return interest;
	}

    double get_balance( )
    //Returns the current account balance.
	{return balance;
	}

    double get_rate( )
    //Returns the current account interest rate as a percentage.
	{return interest_rate;
	}
    
//finally this is the part were we hide the information (the attributes of the class)
private:
    int number;
	double balance;
	double interest;
    double interest_rate;
};
//this is the end of the class


//this is the beginning of the test driver (another term to indicate the main)
int main( )
{double balance; 
 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;

// we create a bank account by using the constructor number 1
    BankAccount account1(balance, RATE);
	cout << "Your account has just been created. The ID number of your account is " << account1.get_number() << "." << endl;
	cout << "Your account has $" << account1.get_balance() << " in it." << endl;

//we ask the account to add the amount to deposit to the balance using the deposit method of the account
    account1.deposit(1000);
	cout << "Your deposit has been performed. Your account now has $" << account1.get_balance() << " in it." << endl;

//we ask the account to subtract the amount to withdraw from the balance using the withdraw method of the account
	account1.withdraw(300);
	cout << "Your withdrawal has been performed. Your account now has $" << account1.get_balance() << " in it." << endl;

//we ask the account to compute the interest of the account
	account1.compute_interest();
	cout << "The interest has been computed. Your account has matured $" << account1.get_interest() << " in it." << endl;

	account1.update();
	cout << "Your account has been updated with your interest. Your balance now is $" << account1.get_balance() << endl;

	cout << "Bye! " << endl;
    return 0;
}