#include <iostream>
#include <conio.h>
using namespace std;

int main() {
	/*
	 *	Bank Example
	 */
	cout << endl << "Bank Example" << endl;
	const int	WITHDRAWAL = 0;
	const int	DEPOSIT = 1;
	const int	TRANSFER = 2;
	const float	MAX_WITHDRAWAL = 500.0;
	double		balance1 = 100.0;
	double		balance2 = 200.0;
	getch();
	
	/*
	 *	If Single Statement
	 */
	cout << endl << "If Single Statement" << endl;
	int		transaction = DEPOSIT;
	double  amount = 250.0;
	
	cout << "\nDeposit Example" << endl;
	cout << "balance1: " << balance1 << endl;
	cout << "depositing: " << amount << endl;
	if ( transaction == DEPOSIT )
		balance1 = balance1 + amount;
	if ( transaction == WITHDRAWAL )
		balance1 = balance1 - amount;
	cout << "balance1: " << balance1 << endl;
	getch();
	
	/*
	 *	If Code Block
	 */
	cout << endl << "If Code Block" << endl;
	transaction = TRANSFER;
	amount = 50.0;

	cout << "\nTransfer Example" << endl;
	cout << "\nBefore Transfer" << endl;
	cout << "balance1: " << balance1 << endl;
	cout << "balance2: " << balance2 << endl;
	cout << "\ntransfering: " << amount << "\tfrom balance1 to balance2" << endl;
	if ( transaction == DEPOSIT )
		balance1 = balance1 + amount;
	if ( transaction == WITHDRAWAL )
		balance1 = balance1 - amount;
	if ( transaction == TRANSFER ) {
        // assume we are transferring from balance1 to 2
		balance1 = balance1 - amount;
		balance2 = balance2 + amount;
	}
	cout << "\nAfter Transfer" << endl;
	cout << "balance1: " << balance1 << endl;
	cout << "balance2: " << balance2 << endl;
	getch();
	
	/*
	 *	If / Else
	 */
	cout << endl << "If / Else" << endl;
	const int	SOME_UNSUPPORTED_TRANSACTION = -123;
	transaction = SOME_UNSUPPORTED_TRANSACTION;
	if ( transaction == DEPOSIT )
		balance1 = balance1 + amount;
	else
		cout << "Unkown Transaction" << endl;
	getch();
	
	/*
	 *	If / Else If
	 */
	cout << endl << "If / Else If" << endl;
	if ( transaction == DEPOSIT )
		balance1 = balance1 + amount;
	else if ( transaction == WITHDRAWAL )
		balance1 = balance1 - amount;
	else if ( transaction == TRANSFER ) {
		balance1 = balance1 - amount;
		balance2 = balance2 + amount;
	} else
		cout << "Unkown Transaction" << endl;
	getch();
	
	/*
	 *	Nested If / Else If
	 */
	cout << endl << "Nested If / Else If" << endl;
	cout << "Before transaction" << endl;
	cout << "balance1: " << balance1 << endl;
	cout << "balance2: " << balance2 << endl;
	cout << "transaction amount: " << amount << endl;
	transaction = TRANSFER;
	
	if ( transaction == DEPOSIT )
		balance1 = balance1 + amount;
	else if ( transaction == WITHDRAWAL )
		balance1 = balance1 - amount;
	else if ( transaction == TRANSFER ) {
		const int ACCOUNT1 = 1;
		const int ACCOUNT2 = 2;
		int from = ACCOUNT1;
		int to   = ACCOUNT2;
		if ( from == ACCOUNT1 && to == ACCOUNT2 ) {
			balance1 = balance1 - amount;
			balance2 = balance2 + amount;
		} else if ( from == ACCOUNT2 && to == ACCOUNT1 ) {
			balance2 = balance2 - amount;
			balance1 = balance1 + amount;
		}
	} else
		cout << "Unkown Transaction" << endl;
	cout << "\nAfter transaction" << endl;
	cout << "balance1: " << balance1 << endl;
	cout << "balance2: " << balance2 << endl;
	getch();
	return 0;
}