Samson Magesh's Contribution

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


//Declaring functions and variables that an item will require
class Item
{
private:
	string name1;
	int value1;
	int count1;

public:
	//constructor
	Item(string name, int value, int count);

	void addItem();
	void removeItem();

	
	string getName() { 
		return name1; 
	}
	int getCount() {
		return count1;
	}
	void setCount(int count) {
		count1 = count;
	}
	int getValue() { 
		return value1; 
	}
};



//increases the count of the item
void Item::addItem()
{
	count1++;
}

//removes an item
void Item::removeItem()
{
	if (count1 > 0) {
		count1--;
	}
}


Item::Item(string name, int value, int count)
{
	name1 = name;
	value1 = value;
	count1 = count;
}


//Declaring the variables and functions the user will need  
class Player
{
private:
	string name1;
	int money1;
	list<Item> listofitems;

public:
	Player();

	void init(string name, int money);

	void Inventory();
	bool canAfford(string name, int money);

	int getMoney() { 
		return money1; 
	}
	void subtractMoney(int amount) {
		money1 -= amount;
	}
	void addMoney(int money) { 
		money1 += money; 
	}
	
	bool removeItem(string name, Item &newItem);
	void addItem(Item newItem);
	
};


//initialize the player
void Player::init(string name, int money)
{
	name1 = name;
	money1 = money;
}

//prints out the users inventory
void Player::Inventory()
{

	cout << name1 << "'s inventory **\n";
	cout << "Money: " << money1 << " \n";
	list<Item>::iterator items;

	int i = 0;

	for (items = listofitems.begin(); items != listofitems.end(); items++) {
		cout << i << ". " << (*items).getName() << " x " << (*items).getCount() << " Price: " << (*items).getValue() << endl;
		i++;
	}
}

Player::Player()
{
}


//Removes the item from the users inventory when sold or used
bool Player::removeItem(string name, Item &newItem)
{
	list<Item>::iterator ShopItem;

	for (ShopItem = listofitems.begin(); ShopItem != listofitems.end(); ShopItem++) {
		if ((*ShopItem).getName() == name) {
			newItem = (*ShopItem);
			(*ShopItem).removeItem();
			if ((*ShopItem).getCount() == 0) {
				listofitems.erase(ShopItem);
			}
			return true;
		}
	}
	return false;
}




//Adds a new item to the users inventory 
void Player::addItem(Item newItem)
{
	list<Item>::iterator ShopItem;

	for (ShopItem = listofitems.begin(); ShopItem != listofitems.end(); ShopItem++) {
		if ((*ShopItem).getName() == newItem.getName()) {
			(*ShopItem).addItem();
			return;
		}
	}
	listofitems.push_back(newItem);
	listofitems.back().setCount(1);
}





//Checks to see how much is in the users account and compares to item value
bool Player::canAfford(string name, int money)
{
	list<Item>::iterator ShopItem;

	for (ShopItem = listofitems.begin(); ShopItem != listofitems.end(); ShopItem++) {
		if ((*ShopItem).getName() == name) {
			if ((*ShopItem).getValue() <= money) {
				return true;
			}
			else {
				return false;
			}
		}
	}
	return false;
}





//Declaring the variables and functions that the shop will need 

class Shop
{

private:
	int money1;
	list<Item> items1;
	string name1;

public:
	Shop(string name, int money);


	void addItem(Item newItem);
	bool AffordItem(string name, int money);
	bool purchaseItem(string name, Item &newItem);
	void printShop();


	string getName() {
		return name1;
	}
	void addMoney(int money) {
		money1 += money; 
	}

	int getMoney() { 
		return money1; 
	}

};


Shop::Shop(string name, int money)
{
	name1 = name;
	money1 = money;
}


//Adds an new item to the shop if an existing one doesn't exist 

void Shop::addItem(Item newItem)
{
	list<Item>::iterator items;

	for (items = items1.begin(); items != items1.end(); items++) {

		if ((*items).getName() == newItem.getName()) {
			(*items).addItem();
			return;
		}
	}

	items1.push_back(newItem);
	items1.back().setCount(1);
}


//Checks to see if the item exists in the shop 

bool Shop::purchaseItem(string name, Item &newItem)
{
	list<Item>::iterator item;

	for (item = items1.begin(); item != items1.end(); item++) {
		if ((*item).getName() == name) {
			newItem = (*item);

			newItem.setCount(1);
			(*item).removeItem();

			if ((*item).getCount() == 0) {
				items1.erase(item);
			}
			return true;
		}
	}
	return false;
}



// Prints the items in the shop  that are available
void Shop::printShop()
{
	cout << " Welcome to " << name1 << " \n";
	cout << "Money: " << money1 << " \n";
	list<Item>::iterator item;

	int i = 0;

	for (item = items1.begin(); item != items1.end(); item++) {
		cout << i << ". " << (*item).getName() << " x " << (*item).getCount() << " Price: " << (*item).getValue() << endl;
		i++;
	}

	cout << endl;

}


//Checks to see if the user can afford to buy the item

bool Shop::AffordItem(string name, int money)
{
	list<Item>::iterator item;

	for (item = items1.begin(); item != items1.end(); item++) {
		if ((*item).getName() == name) {
			if ((*item).getValue() <= money) {
				return true;
			}
			else {
				return false;
			}
		}
	}
	return false;
}





void initializePlayer(Player &player);

void InitializeShops(list<Shop> &shops);

void AccessShop(Player &player, Shop &shop);

//As the game begins the user will be given pokeballs by default

void initializePlayer(Player &player)
{
	cout << "Enter your name: ";
	string name;
	getline(cin, name);
	player.init(name, 100);

	player.addItem(Item("Pokeballs", 150, 3));

	cout << endl;
}




//The shop will have some items by default in it for the user to buy
void InitializeShops(list<Shop> &shops)
{

	shops.push_back(Shop("Essentials shop", 500));
	shops.back().addItem(Item("Health potion", 50, 3));


	shops.push_back(Shop("Exclusive items shop", 1200));
	shops.back().addItem(Item("Armour", 1000, 1));


}



//Allows the player to buy or sell items from the shop
//If there are no items in the shop the user will be told

void AccessShop(Player &player, Shop &shop)
{

	bool Ended = false;
	char input;
	string itemName;
	Item newItem("NOITEM", 0, 1);

	while (Ended == false) {
		shop.printShop();
		player.Inventory();

		cout << "\nWould you like to buy or sell? Enter q to quit. (b/s): ";
		cin >> input;
		cin.ignore(64, '\n');
		cin.clear();


		if (input == 'Q' || input == 'q') 
			return;

		if (input == 'B' || input == 'b') {
			cout << "Enter the item you to buy: ";
			getline(cin, itemName);

			if (shop.AffordItem(itemName, player.getMoney())) {

				if (shop.purchaseItem(itemName, newItem) == true) {
					player.addMoney(-newItem.getValue());
					player.addItem(newItem);
					shop.addMoney(newItem.getValue());
				}
				else {
					cout << "That is an invalid item!\n";
					system("PAUSE");
				}
			}
			else {
				cout << "You don't have enough money!\n";
				system("PAUSE");
			}

		}
		else { 
			cout << "Enter the item you to sell: ";
			getline(cin, itemName);


			if (player.canAfford(itemName, shop.getMoney())) {

				if (player.removeItem(itemName, newItem) == true) {
					shop.addMoney(-newItem.getValue());
					shop.addItem(newItem);
					player.addMoney(newItem.getValue());
				}
				else {
					cout << "That is not a valid item!\n";
					system("PAUSE");
				}
			}
			else {
				cout << "You don't have enough money\n";
				system("PAUSE");
			}
		}
	}
}



int main()
{
	Player player;
	string shopName;
	list<Shop> Listofshops;
	list<Shop>::iterator items;
	initializePlayer(player);
	InitializeShops(Listofshops);

	
	bool Ended = false;

	while (Ended == false) {
		cout << "Shops:\n";
		int i = 1;

		for (items = Listofshops.begin(); items != Listofshops.end(); items++) {
			cout << i << ". " << (*items).getName() << endl;
			i++;
		}

		cout << "\nWhat shop would you like to enter? Q to quit: ";
		
		getline(cin, shopName);

		
		if (shopName == "Q" || shopName == "q") {
			Ended = true;
		}
		else {

			cout << endl;

			bool RealShops = false;
			//check to see if the user entered a valid shop
			for (items = Listofshops.begin(); items != Listofshops.end(); items++) {
				if ((*items).getName() == shopName) {
					AccessShop(player, (*items));
					RealShops = true;
				}
			}

			if (RealShops == false) {
				cout << "Invalid Shop!\n";
				system("PAUSE");
			}
		}

	}

	system("PAUSE");
	return 0;
}