Overload function error

[TheJollyRoger]

Now I just have issue figuring out how to add the quantities, as in if I make the same selection more than once it only calculates one.

//

//Preprocessor Directives
#include <iostream>
#include <string>
#include <iomanip>
#include <string>

using namespace std;

//Menu Structure
struct menuOptions 
{
	int quantity;
	double price;
	string description;
};

//prototype
void displayMenu(menuOptions menu[], int size);
void getData(menuOptions menu[], int &size);
void printCheck(menuOptions menu[], int size);

//constants
const int max = 8;
const double taxes = 0.05;

// main function
int main()
{
	menuOptions menu[max];
	int size = 0;

	getData(menu, size);

	displayMenu(menu, size);

	printCheck(menu, size);

	system("pause");
	// exit main
	return 0;
}

//getting the data in to array
void getData(menuOptions menu[], int &size)
{
	menu[0].description = "Plain Egg"; menu[0].price = 1.45; menu[0].quantity = 0;

	menu[1].description = "Bacon and Egg"; menu[1].price = 2.45; menu[1].quantity = 0;

	menu[2].description = "Muffin"; menu[2].price = 0.99; menu[2].quantity = 0;

	menu[3].description = "French Toast"; menu[3].price = 1.99; menu[3].quantity = 0;

	menu[4].description = "Fruit Basket"; menu[4].price = 2.49; menu[4].quantity = 0;

	menu[5].description = "Cereal"; menu[5].price = 0.69; menu[5].quantity = 0;

	menu[6].description = "Coffee"; menu[6].price = 0.50; menu[6].quantity = 0;

	menu[7].description = "Tea"; menu[7].price = 0.75; menu[7].quantity = 0;

	size = 8;
} 
//display menu and tell user what to do
void displayMenu(menuOptions menu[], int size)
{
	cout << "Welcome to Johnny's Restaurant" << endl;
	cout << setw(20) << "Johnny's Menu" << endl;
	for (int i = 0; i < size; i++)
	{
		cout << (i + 1) << ". " << left << setw(21) << menu[i].description << "$" << setw(6) << setprecision(2) << fixed << menu[i].price << endl;
	}
	cout << "------------------------------" << endl;

	int number;
	int quantity;

	cout << "\nSelect your item 1-8. Press 9 when you are finished: ";
	cin >> number;

	while (number != 9)
	{
		if (number >= 1 && number <= 8)
		{
			menu[number -1].quantity = 1;
		}
		else
		{
			cout << "Invalid Option! Item selection 1-8, and press 9 to finish your order!" << endl;
		}

		cout << "Select your item 1-8. Press 9 when you are finished: ";
		cin >> number;
	}
}
//calc and print check
void printCheck(menuOptions menu[], int size)
{
	double totalPrice = 0;
	double totalTax = 0;

	cout << "\nYour Check is:" << endl;
	cout << endl << "Welcome to Johnny's Restaurant" << endl;
	for (int i = 0; i < size; i++)
	{
		if (menu[i].quantity > 0)
		{
			cout << left << setw(2) <<menu[i].quantity <<setw(22) << menu[i].description << "$" << setw(12) << setprecision(2) << fixed << menu[i].price << endl;
			totalPrice += menu[i].price;
		}
	}

	totalTax = totalPrice * taxes;
	cout << setw(24) << "Tax:" << "$" << setw(14) << setprecision(2) << fixed << totalTax << endl;
	cout << setw(24) << "Amount Due:" << "$" << setw(14) << setprecision(2) << fixed << (totalPrice + totalTax) << endl << endl;
}
}