I need help with this. The question can be found here http://www.chegg.com/homework-help/questions-and-answers/assignment-ll-make-inventory-system-store-s-items-including-produce-books-starter-program--q9333691 #include  #include  #include  #include  using namespace std; class Item { public: void SetName(string nm)//newName { name = nm; }; void SetQuantity(int qnty)//new Quant { quantity = qnty; }; void SetPrice(int prcInDllrs) { priceInDollars = prcInDllrs;} //Total value of item int GetTotalValueAsPrice() { return priceInDollars*quantity; } virtual void Print() { cout << name << " " << quantity << endl; }; virtual ~Item() { return; }; protected: string name; int quantity; int priceInDollars; }; class Produce : public Item { // Derived from Item class public: void SetExpiration(string expir) { expiration = expir; }; void Print() { cout << name << " x" << quantity << " for $" << priceInDollars //step1 << " (Expires: " << expiration << ")" << endl; }; private: string expiration; }; //Derived book class: Step 2 class Book : public Item { public: //Set the author's name void SetAuthor(string authr) { author = authr; }; //Print book information void Print() { cout << name << " x" << quantity << " for $" << priceInDollars //step1 << " (Author: " << author << ")" << endl; }; private: string author; }; class Inventory { public: void PrintInventory(vector inventory) { int k1 = 0; int totalInventory;//int totalInvPriceInDollars if (inventory.size() == 0) { cout << "Inventory is empty." << endl; } else { for (k1 = 0; k1 < inventory.size(); ++k1) { cout << k1 << " - "; inventory.at(k1)->Print(); } cout << "Total inventory value: $" << totalInventory << endl; } }; //private: // vector inventory; // int totalInventory; // //Calculate total price of items. // void SumInv() // { // totalInventory=0; // for(int k1= 0; k1GetTotalValueAsPrice(); // } // } //}; //// Dialogue to create a new item, then add that item to the inventory vector AddItemToInventory(vector inventory) { Produce *prdc; Book *book; string usrInptName = ""; string usrInptQntyStr = ""; istringstream inSS; int inputPrice = 0; int usrInptQnty = 0; string usrInptExpr = ""; string usrIndexChoice = " "; string bookAUTHOR = ""; string bookTITLE = ""; //Get user choice of adding either a book or produce do { cout << "Enter choice of adding (b)ook or (p)roduce: "; getline(cin, usrIndexChoice); if (usrIndexChoice != "b" && usrIndexChoice != "p") { cout << "Invalid Choice" << endl; } } while (usrIndexChoice != "b" && usrIndexChoice != "p"); //Add new produce if (usrIndexChoice == "p") { //Info needed for new produce cout << "Enter new produce name: "; getline(cin, usrInptName); cout << "Enter quantity: "; getline(cin, usrInptQntyStr); inSS.str(usrInptQntyStr); inSS >> usrInptQnty; inSS.clear(); cout << "Enter expiration date: "; getline(cin, usrInptExpr); cout << "Enter the price per item : $"; cin >> inputPrice; prdc = new Produce; prdc->SetName(usrInptName); prdc->SetQuantity(usrInptQnty); prdc->SetExpiration(usrInptExpr); prdc->SetPrice(inputPrice); inventory.push_back(prdc); return inventory; } //Adding new book to inventory if (usrIndexChoice == "b") { //Get book info cout << "Enter name of new book: "; getline(cin, bookTITLE); cout << "Enter quantity: "; getline(cin, usrInptQntyStr); inSS.str(usrInptQntyStr); inSS >> usrInptQnty; inSS.clear(); cout << "Enter author: "; getline(cin, bookAUTHOR); cout << "Enter price per item: $"; cin >> inputPrice; book = new Book; book->SetName(bookTITLE); book->SetQuantity(usrInptQnty); book->SetAuthor(bookAUTHOR); book->SetPrice(inputPrice); //Add book to inventory vector inventory.push_back(book); return inventory; // }; // SumInv(); } //// Dialogue to update the quantity of an item, then update that item in the inventory vector UpdateItemQtyInInventory(vector inventory) { string usrIndexChoiceStr = ""; unsigned int usrIndexChoice = 0; istringstream inSS; string usrInptQntyStr = ""; int usrInptQnty = 0; if (inventory.size() == 0) { cout << "No items to update." << endl; } else { PrintInventory(inventory); do { cout << "Update which item #: "; getline(cin, usrIndexChoiceStr); inSS.str(usrIndexChoiceStr); inSS >> usrIndexChoice; inSS.clear(); } while (!(usrIndexChoice < inventory.size())); cout << "Enter new quantity: "; getline(cin, usrInptQntyStr); inSS.str(usrInptQntyStr); inSS >> usrInptQnty; inSS.clear(); inventory.at(usrIndexChoice)->SetQuantity(usrInptQnty); }; // SumInv(); return inventory; } //// Dialogue to remove a specific item, then remove that specific item from the inventory vector RemoveItemFromInventory(vector inventory) { istringstream inSS; string usrIndexChoiceStr = ""; unsigned int usrIndexChoice = 0; string usrInptQntyStr = ""; if (inventory.size() == 0) { cout << "No items to remove." << endl; } else { PrintInventory(inventory); do { cout << "Remove which item #: "; getline(cin, usrIndexChoiceStr); inSS.str(usrIndexChoiceStr); inSS >> usrIndexChoice; inSS.clear(); } while (!(usrIndexChoice < inventory.size())); inventory.erase(inventory.begin() + usrIndexChoice); //SumInv(); return inventory; } private: vector inventory; int totalInventory; //Calculate total price of items. void SumInv() { totalInventory = 0; for (int k1 = 0; k1 < inventory.size(); ++k1) { totalInventory += inventory.at(k1)->GetTotalValueAsPrice(); } } }; int main() { vector inventory; string usrInptOptn = "default"; while (true) { // Get user choice cout << " Enter (p)rint, (a)dd, (u)pdate, (r)emove, or (q)uit: "; getline(cin, usrInptOptn); // Process user choice if (usrInptOptn.size() == 0) { continue; } else if (usrInptOptn.at(0) == 'p') { PrintInventory(inventory); } else if (usrInptOptn.at(0) == 'a') { inventory = AddItemToInventory(inventory); } else if (usrInptOptn.at(0) == 'u') { inventory = UpdateItemQtyInInventory(inventory); } else if (usrInptOptn.at(0) == 'r') { inventory = RemoveItemFromInventory(inventory); } else if (usrInptOptn.at(0) == 'q') { cout << " Good bye." << endl; break; } } return 0; } } }