Automated Teller Machine sim

atm.cpp

#include <iostream>
#include <list>
#include <algorithm>

using namespace std;

struct MoneyBundle
{
	int denomination;
	int count;
	MoneyBundle(int d, int c) : denomination(d), count(c) {}
};

class AutomatedTellerMachine
{
private:
	list<MoneyBundle*> money;
	long totalMoney;
public:
	AutomatedTellerMachine();
	~AutomatedTellerMachine();
	//void AdminDeposit(int denomination, int numberofunits){};
	void AdminShowStatus();
	void UserWithDraw(int amount);
private:
	void Purge(list<MoneyBundle*> & mblist);
	long CalculateTotal(list<MoneyBundle*> & mblist);
	void ServRequest(list<MoneyBundle*> & servlist);
};

AutomatedTellerMachine::AutomatedTellerMachine()
{
	money.push_back(new MoneyBundle(2000, 2));
	money.push_back(new MoneyBundle(1000, 4));
	money.push_back(new MoneyBundle(500, 1));
	money.push_back(new MoneyBundle(200, 3));
	money.push_back(new MoneyBundle(100, 10));
	money.push_back(new MoneyBundle(50, 5));
	money.push_back(new MoneyBundle(20, 5));
	money.push_back(new MoneyBundle(10, 8));
	money.push_back(new MoneyBundle(5, 10));
	money.push_back(new MoneyBundle(2, 10));
	money.push_back(new MoneyBundle(1, 1));
	totalMoney = CalculateTotal(money);

	//money.push_back(new MoneyBundle(2000, 0));
	//money.push_back(new MoneyBundle(1000, 0));
	//money.push_back(new MoneyBundle(500, 0));
	//money.push_back(new MoneyBundle(200, 0));
	//money.push_back(new MoneyBundle(100, 0));
	//money.push_back(new MoneyBundle(50, 0));
	//money.push_back(new MoneyBundle(20, 0));
	//money.push_back(new MoneyBundle(10, 3));
	//money.push_back(new MoneyBundle(5, 8));
	//money.push_back(new MoneyBundle(2, 9));
	//money.push_back(new MoneyBundle(1, 0));
	//totalMoney = CalculateTotal(money);
}

AutomatedTellerMachine::~AutomatedTellerMachine(){
	Purge(money);
}

void AutomatedTellerMachine::Purge(list<MoneyBundle*> & mblist)
{
	list<MoneyBundle*>::iterator i = mblist.begin();
	while (i != mblist.end()){
		MoneyBundle* mb = *i;
		delete mb;
		i++;
	}
	mblist.clear();
}

long AutomatedTellerMachine::CalculateTotal(list<MoneyBundle*> & mblist)
{
	long sum = 0;
	for (list<MoneyBundle*>::iterator i = mblist.begin(); i != mblist.end(); ++i){
		MoneyBundle* mb = *i;
		sum += mb->count * mb->denomination;
	}
	return sum;
}


void AutomatedTellerMachine::AdminShowStatus()
{
	long sum = 0;
	cout << "***ATM STATUS***" << endl;
	for (list<MoneyBundle*>::iterator i = money.begin(); i != money.end(); ++i){
		MoneyBundle* mb = *i;
		long bundleAmount = mb->count * mb->denomination;
		cout << "$" << mb->denomination << " * " << mb->count << " = " << bundleAmount << endl;
		sum += bundleAmount;
	}
	cout << "$Total: " << sum << endl;
}


void AutomatedTellerMachine::UserWithDraw(int amount)
{
	if (totalMoney == 0){
		cout << "***CANNOT PROCESS REQUEST***" << endl;
		cout << "No Cash\n";
		return;
	}

	int requestedAmount = amount;

	if (requestedAmount <= 0){
		cout << "***CANNOT PROCESS REQUEST***" << endl;
		cout << "Amount should be greater than 0\n";
		return;
	}

	if (requestedAmount > totalMoney){
		cout << "***CANNOT PROCESS REQUEST***" << endl;
		cout << "Try a smaller amount\n";
		return;
	}

	list<MoneyBundle*> servlist;

	for (list<MoneyBundle*>::iterator i = money.begin(); i != money.end(); ++i){
		MoneyBundle* mb = *i;
		if (mb->count == 0)
			continue;
		int requiredcount = requestedAmount / mb->denomination;
		if (requiredcount > 0) {
			if (requiredcount > mb->count) {
				requiredcount = mb->count;
			}
			servlist.push_back(new MoneyBundle(mb->denomination, requiredcount));
			requestedAmount = requestedAmount - requiredcount*mb->denomination;
		}
	}

	if (CalculateTotal(servlist) != amount){
		Purge(servlist);
		requestedAmount = amount;
		for (list<MoneyBundle*>::reverse_iterator it = money.rbegin(); it != money.rend(); ++it){
			MoneyBundle* mb = *it;
			if (mb->count == 0)
				continue;
			int requiredcount = requestedAmount / mb->denomination;
			if (requiredcount > 0) {
				if (requiredcount > mb->count) {
					requiredcount = mb->count;
				}
				servlist.push_back(new MoneyBundle(mb->denomination, requiredcount));
				requestedAmount = requestedAmount - requiredcount*mb->denomination;
			}
		}
	}

	if (CalculateTotal(servlist) != amount){

		//int index = 0;
		//for (list<MoneyBundle*>::iterator k = money.begin(); k != money.end(); ++k) {
		//	if ((*k)->count > 0){
		//		++index;
		//	}
		//}
		//int lastIndex = index - 1;

		int count = count_if(money.begin(), money.end(), [](const MoneyBundle* mb){return (mb->count > 0); });
		int lastIndex = count - 1;

		cout << "***CANNOT PROCESS REQUEST***" << endl;
		if (count > 0) {
			cout << "Try multiples of ";
			int index = 0;
			for (list<MoneyBundle*>::iterator k = money.begin(); k != money.end(); ++k) {
				MoneyBundle* mb = *k;
				if (mb->count > 0) {
					cout << mb->denomination;
					if (index < lastIndex - 1)
						cout << ", ";
					else if (index == lastIndex - 1)
						cout << " and ";
					else
						cout << ".";
					++index;
				}
			}
			cout << endl;
		}
		else{
			cout << "No Cash" << endl;
		}

	}
	else{
		cout << "***TAKE CASH***" << endl;
		ServRequest(servlist);
	}
	Purge(servlist);
}

void AutomatedTellerMachine::ServRequest(list<MoneyBundle*> & servlist)
{
	long sum = 0;
	list<MoneyBundle*>::iterator i = servlist.begin();
	while (i != servlist.end()){
		MoneyBundle* rm = *i;
		cout << "Droppping " << rm->count << "nos. of $" << rm->denomination << " =  " << rm->count * rm->denomination << endl;
		for (list<MoneyBundle*>::iterator j = money.begin(); j != money.end(); ++j) {
			MoneyBundle* mb = *j;
			if (mb->denomination == rm->denomination) {
				mb->count -= rm->count;
			}
		}
		long bundleAmount = rm->count * rm->denomination;
		sum += bundleAmount;
		++i;
	}
	totalMoney -= sum;
}

int main()
{
	AutomatedTellerMachine atm;
	char choice = 'y';
	int amount = 0;
	while (choice == 'y' || choice == 'Y')
	{
		atm.AdminShowStatus();
		cout << "\nEnter withdrawal amount: ";
		amount = 0;
		cin >> amount;
		cin.get();
		atm.UserWithDraw(amount);
		cout << "\nDo you want to continue: y/n ";
		choice = cin.get();
	}
	return 0;
}