// Bank Account Application using C++ Classes

#include <iostream>
#include <string>
using namespace std;

class bankaccount
{

private:

	// these variables can be used within this class only
	int accountnumber;
	string name;

protected:

	// variables under this section could be used in subclasses
	double balance;

public:

	bankaccount()							// default constructor
	{
		accountnumber = 0;
		name = "NoName";
		balance = 0;
	}

	bankaccount( int an, const string& n )	// constructor with parameters
	{
		accountnumber = an;
		name = n;
		balance = 0;
	}

	void deposit( double amount )
	{
		balance = balance + amount;
	}

	void withdraw( double amount )
	{
		if ( amount <= balance )
			balance = balance - amount;
	}

	void setname( const string& n )
	{
		name = n;
	}

	string getname()
	{
		return name;
	}

	void setnumber( int an )
	{
		accountnumber = an;
	}

	int getnumber()
	{
		return accountnumber;
	}

	double getbalance()
	{
		return balance;
	}

};

class checkingaccount: public bankaccount
{

private:
	int numchecksdrawn;

	void applypenalty( double amount )
	{
		balance = balance - amount;	// can access bankaccount's balance because
									// it is protected
	}

public:

	checkingaccount()
	{
		numchecksdrawn = 0;
	}

	void withdraw( double amount )
	{
		bankaccount::withdraw( amount );	// calls bankaccount's withdraw() method		
		if ( getbalance() < 500 )	// below minimum balance
			applypenalty( 10.00 );	// apply penalty
	}

	void drawcheck( double amount )
	{
		withdraw( amount );
		numchecksdrawn++;
	}

	int getnumchecksdrawn()
	{
		return numchecksdrawn;
	}

};

int main()
{

	bankaccount myacct;	// default constructor is invoked
	bankaccount namedaccount( 123, "John Smith" );
						// constructor with parameters is invoked

	myacct.deposit( 1000.00 );
	myacct.withdraw( 200.00 );
	cout << myacct.getnumber()
		<< " balance: "
		<< myacct.getbalance()
		<< endl;

	namedaccount.deposit( 5000.00 );
	namedaccount.withdraw( 2000.00 );
	cout << namedaccount.getnumber()
		<< " balance: "
		<< namedaccount.getbalance()
		<< endl;

	// can't do the following (access balance directly) because the variable is private/protected
	// namedaccount.balance = 1000000.00;

	checkingaccount anotheraccount;
	anotheraccount.setname( "Michael Jones" );
	anotheraccount.setnumber( 456 );

	anotheraccount.deposit( 5000.00 );		// bankacount's deposit()
	anotheraccount.drawcheck( 3600.00 );	// checking account's drawcheck();
	anotheraccount.withdraw( 1000.00 );		// which withdraw() method does this invoke?

	cout << anotheraccount.getnumber()
		<< " balance: "
		<< anotheraccount.getbalance()
		<< ", checks drawn: "
		<< anotheraccount.getnumchecksdrawn()
		<< endl;

	// can't do the following because the method is private
	// anotheraccount.applypenalty( 10.00 );

	return 0;
}