Design and implement a simple console application in C that models an online store inventory system based on the requirements and class relationships described below
Class Descriptions
Item Represents a generic item sold in the online store Each ite

Question

Design and implement a simple console application in C++ that models an online store inventory system, based on the requirements and class relationships described below:
Class Descriptions:
Item: Represents a generic item sold in the online store. Each item is characterized by a unique identifier (ID), a name, and a price. The Item class should provide methods to get and set these properties. Additionally, it should include a method to print item details.
Vendor: Represents a vendor supplying items to the store. A vendor is described by a vendor ID, a name, and an address. This class should provide methods to get and set these properties. The toString() method should return a string representation of the vendor, including all its details.
StoreItem: Extends the Item class. In addition to the properties inherited from Item, StoreItem includes a property to store the vendor (supplier) of the item. The class should override the method to print item details to include vendor information if available. It should also include a method getVendorName() that returns the name of the vendor if set, or "Unknown" if not.
Implementation Details:
•
The StoreItem class should be initialized with an ID, name, and price. Vendor details should be set using a separate method, setVendor(), which takes a Vendor object as a parameter.
•
The toString() method in both Vendor and StoreItem should return a string representation of the object's state in a readable format. For StoreItem, implement two versions of toString(): one that only returns item details and another that also includes vendor details based on a boolean parameter.
Application Flow:
•
Your console application should prompt the user to enter details for a list of items and their corresponding vendors.
•
After entering the details, the application should display the information of each StoreItem using the toString() method, first without vendor details and then with vendor details.
•
It should also demonstrate the use of getVendorName() for each StoreItem.

Amosh Neupane · Answer

Here's a simple console application in C++ that models an online store inventory system based on your requirements:

#include 
#include 
#include 

// Item class
class Item {
private:
    int id;
    std::string name;
    double price;

public:
    Item(int id, const std::string& name, double price) : id(id), name(name), price(price) {}

    int getId() const { return id; }
    void setId(int id) { this->id = id; }

    std::string getName() const { return name; }
    void setName(const std::string& name) { this->name = name; }

    double getPrice() const { return price; }
    void setPrice(double price) { this->price = price; }

    virtual std::string toString() const {
        return "ID: " + std::to_string(id) + ", Name: " + name + ", Price: " + std::to_string(price);
    }

    virtual void print() const {
        std::cout << toString() << std::endl;
    }
};

// Vendor class
class Vendor {
private:
    int vendorId;
    std::string name;
    std::string address;

public:
    Vendor(int vendorId, const std::string& name, const std::string& address) 
        : vendorId(vendorId), name(name), address(address) {}

    int getVendorId() const { return vendorId; }
    void setVendorId(int vendorId) { this->vendorId = vendorId; }

    std::string getName() const { return name; }
    void setName(const std::string& name) { this->name = name; }

    std::string getAddress() const { return address; }
    void setAddress(const std::string& address) { this->address = address; }

    std::string toString() const {
        return "Vendor ID: " + std::to_string(vendorId) + ", Name: " + name + ", Address: " + address;
    }
};

// StoreItem class
class StoreItem : public Item {
private:
    Vendor* vendor;

public:
    StoreItem(int id, const std::string& name, double price) 
        : Item(id, name, price), vendor(nullptr) {}

    void setVendor(Vendor* vendor) { this->vendor = vendor; }

    std::string getVendorName() const {
        return vendor ? vendor->getName() : "Unknown";
    }

    std::string toString(bool includeVendor = false) const {
        std::string result = Item::toString();
        if (includeVendor && vendor) {
            result += ", Vendor: [" + vendor->toString() + "]";
        }
        return result;
    }

    void print() const override {
        std::cout << toString() << std::endl;
    }
};

int main() {
    std::vector items;
    std::vector vendors;

    int itemCount, vendorCount;
    std::cout << "Enter number of items: ";
    std::cin >> itemCount;
    std::cout << "Enter number of vendors: ";
    std::cin >> vendorCount;

    for (int i = 0; i < vendorCount; ++i) {
        int id;
        std::string name, address;
        std::cout << "Enter vendor ID: ";
        std::cin >> id;
        std::cout << "Enter vendor name: ";
        std::cin.ignore();
        std::getline(std::cin, name);
        std::cout << "Enter vendor address: ";
        std::getline(std::cin, address);
        vendors.emplace_back(id, name, address);
    }

    for (int i = 0; i < itemCount; ++i) {
        int id;
        std::string name;
        double price;
        std::cout << "Enter item ID: ";
        std::cin >> id;
        std::cout << "Enter item name: ";
        std::cin.ignore();
        std::getline(std::cin, name);
        std::cout << "Enter item price: ";
        std::cin >> price;

        StoreItem item(id, name, price);
        int vendorChoice;
        std::cout << "Select vendor for the item (enter vendor ID, 0 for none): ";
        std::cin >> vendorChoice;

        if (vendorChoice != 0) {
            for (auto& vendor : vendors) {
                if (vendor.getVendorId() == vendorChoice) {
                    item.setVendor(&vendor);
                    break;
                }
            }
        }
        items.push_back(item);
    }

    std::cout << "
Store Items:
";
    for (const auto& item : items) {
        item.print();
    }

    std::cout << "
Store Items with Vendor Details:
";
    for (const auto& item : items) {
        std::cout << item.toString(true) << std::endl;
    }

    std::cout << "
Vendor Names for Each Item:
";
    for (const auto& item : items) {
        std::cout << "Item " << item.getId() << " Vendor: " << item.getVendorName() << std::endl;
    }

    return 0;
}

This C++ program follows the given specifications:

Defines Item, Vendor, and StoreItem classes with appropriate properties and methods.
Prompts the user to enter details for a list of items and their corresponding vendors.
Displays the information of each StoreItem without vendor details, then with vendor details.
Demonstrates the use of getVendorName() for each StoreItem.

To compile and run this program, you can use a C++ compiler like g++:

g++ -o online_store online_store.cpp
./online_store

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