arrays and pointers

I need to use dynamic memory allocation and use pointers to iterate through the arrays that I have already in this program. I am lost, nothing I do works and I have no idea where to use the pointers. I am just looking for a push in the right direction so I can finish this project and get a better idea of how I can implement pointers in my program. I have read and watched many tutorials but like I said, nothing is working. Any help would be great.
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#include <iostream>
#include <string>
#include <cstdlib>
#include <iomanip>
#include <stdio.h>
using namespace std;

/* run this program using the console pauser or add your own getch, system("pause") or input loop */
class Customer //this is my class
{
public: // these are the methods of my class
	void setCustName(string name) //sets the customers name
	{
		customerName = name;
	}
	void setCustAddress(string address) // sets the customer address
	{
		customerAddress = address;
	}
	string getCustName() const //gets the customer name
	{
		return customerName;
	}
	string getCustAddress() const //gets the customer address
	{
		return customerAddress;
	}
	void displaymessage1() const // message that displays the name
	{
		cout << "Welcome " << getCustName() << " to Games2Go.\n";
	}
	void displaymessage2() const //message that displays the shipping destination
	{
		cout << "Your order will be shipped to " << getCustAddress() << "\n";
	}
private: // these are the attributes or variales of my class.
	string customerName;
	string customerAddress;
};
	int menu(string custName){
	int Selection;
		cout << "           Thank you for visiting Games2Go\n";// welcome message to the customer
	cout << "\n";
	cout << custName <<" Please select from the product menu below.\n";// this is introducing the product menu
	
		cout <<	"                   Product Menu\n"; // this menu give the customer different ways to search for the game they want.
		cout << "\n";
		cout << "             Product name                                Price\n";
		cout << "\n";
		cout << "\n";
		cout << "1 - Call of Duty: Advanced Warfare                       $59.00\n";
		cout << "2 - Destiny                                              $65.00\n";
		cout << "3 - Assasins Creed: Unity                                $45.00\n";
		cout << "4 - NBA 2K15                                             $52.00\n";
		cout << "5 - Super Smash Bros                                     $59.00\n";
		cout << "6 - Watch Dogs                                           $49.00\n";
		cout << "7 - Starcraft                                            $19.00\n";
		cout << "8 - Counterstrike                                        $25.00\n";
		cout << "\n";
		cout << " Enter 0 to quit and check out\n";
		cin >> Selection;
		return Selection;
	}
	double salesprice (int Selection, int quantity[], double line[]){ // this is the fuction to get the price before taxes
	double price;
	cout << "Enter the quantity you would like to buy\n";
	cin >> quantity[Selection-1];
	switch(Selection){
		case 1: { price = 59;}
		break;
		case 2: { price = 65;}
		break;
		case 3: { price = 45;}
		break;
		case 4: { price = 52;}
		break;
		case 5: { price = 59;}
		break;
		case 6: { price = 49;}
		break;
		case 7: { price = 19;}
		break;
		case 8: { price = 25;}
		break;
		break;
		default: {price = 0;}
		break;
	}
	line[Selection-1] = price*quantity[Selection-1];
	return line[Selection-1];
	}
	double totaltax (double price) // this is the fuction to calculate the sales tax
	{
		const double TAX = 0.05;
		double saleTax;
		saleTax = (price *TAX);
		return saleTax;
	}
	void showProducts(string order[], int quantity[], double lines[])
	{
		cout << "\n";
		cout << setw(33) <<          "This is your current order\n";
		cout << "\n";
		cout << setw(36) <<"     Product              " << setw(5) << "Quantity" << setw(10) << "Price\n";
		cout << "\n";
		for (int count=0; count<8; count++){
			cout << setw(30)<< order[count] << setw(9)<< quantity[count] << setw(12)<<lines[count]<<"\n";
		}
	}
int main() 
{
	Customer myCustomer;
	string custName;
	string custAddress;
	int Selection;
	double totalsalestax = 0;
	double subtotal = 0;
	double totalsale = 0;
	double totalprice = 0;
	string productOrder[8] = {"Call of Duty: Advanced Warfare", "Destiny", "Assasins Creed: Unity", "NBA 2K15", "Super Smash Bros", "Watch Dogs", "Starcraft", "Counterstrike"};
	double lineAmount[8] = {0, 0, 0, 0, 0, 0, 0, 0};
	int orderQty[8] = {0, 0, 0, 0, 0, 0, 0, 0};
	cout << fixed << setprecision(2);
	cout << "Please enter your name:"; // asks customers name
	getline (cin, custName);
	cout << "\n";
	myCustomer.setCustName(custName); //sets the customer name as the input custName
	cout << "Please enter your address:"; // asks customers address
	getline (cin, custAddress);
	cout << "\n";
	myCustomer.setCustAddress(custAddress); // sets the customer address as the input custAddress
	myCustomer.displaymessage1(); // displays the welcome message for the customer name
	cout << "\n";
	Selection = menu(custName);
	int count = 0;
	while (Selection !=0)
	{
		subtotal = salesprice(Selection, orderQty, lineAmount);
		cout << "Your last selection totalled $" << subtotal <<"\n";
		showProducts(productOrder, orderQty, lineAmount);
		cout << "\n";
		totalprice = totalprice + subtotal;
		cout << "The total of your order so far is $" << totalprice << "without tax\n";
		Selection = menu(custName);
	}
	totalsalestax = totaltax(subtotal);
	totalsale = totalsalestax+subtotal;
	cout << "Your reciept is as follows\n";
	showProducts(productOrder, orderQty, lineAmount);
	cout << "\n";
	cout << "Your final order amount is $" << totalprice << "\n";
	cout << "\n";
	cout << "You paid $" << totalsalestax << " in taxes today\n";
	cout << "\n";
	cout << "Your total purchase amount is $" << totalsale << "\n";
	cout << "\n";
myCustomer.displaymessage2();	//displays the customer address information
return 0;
}
Well first of all, I don't see any usage of the pointer operator *.

Anyways, this should help: http://www.cplusplus.com/doc/tutorial/dynamic/
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