gistfile1.cpp

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

struct Product
{
	string Name;
};

struct Inventory
{
	Product* Products;
	int Count;
};

void InitInventory(Inventory* inventory)
{
	inventory->Products = NULL;
	inventory->Count = 0;
}

void AddProduct(Inventory* inventory, Product product)
{		
	if (inventory->Products == NULL)
	{
		inventory->Products = new Product[1];
		inventory->Products[0] = product;
		inventory->Count = 1;
	}
	else
	{
		Product* temp = inventory->Products;
		inventory->Products = new Product[inventory->Count + 1];

		for (unsigned int i = 0; i < inventory->Count; i++)
		{
			inventory->Products[i] = temp[i];
		}
			
		inventory->Products[inventory->Count] = product;
		inventory->Count++;
		delete [] temp;
	}
}

void DestroyInventory(Inventory* inventory)
{
	if (inventory->Products == NULL)
		return;
	
	delete [] inventory->Products;
	inventory->Products = NULL;
	inventory->Count = 0;
}

int main()
{
	Inventory inventory;
	InitInventory(&inventory);

	while (true)
	{
		cout << "Enter a product name or '' to exit: ";
		Product product;
		getline(cin, product.Name);

		if (product.Name == "")
			break;

		AddProduct(&inventory, product);
	}

	for (unsigned int i = 0; i < inventory.Count; i++)
	{
		cout << "[" << i << "] - " << inventory.Products[i].Name << "\n";
	}

	DestroyInventory(&inventory);

	cin.get();
	return 0;
}