Suppose you are working as a software developer for a company that sells various types of products.

Suppose you are working as a software developer for a company that
sells various types of products. The company wants to keep track of its
inventory using a linked list data structure. You are asked to develop a C++ program
that will allow the company to add, remove and update products in their
inventory using a linked list.

Requirements:

• You have to use only the Linked List data structure for this assignment. Your marks will be
  deducted if any other data structure is used


• Your program should
  perform the below-mentioned operations on the output console:

1.       
Add a new
product to the inventory: The user should be able to add a new product to the
inventory by providing the product name, product ID, quantity, and price.

2.       
Remove a
product from the inventory: The user should be able to remove a product from
the inventory by providing the product ID.

3.       
Update a
product in the inventory: The user should be able to update the quantity or
price of a product in the inventory by providing the product ID.

4.       
Display
the inventory: The user should be able to view the entire inventory, including
the product name, product ID, quantity, and price.

l 
Your
program should be implemented using a linked list data structure, with each
node representing a single product in the inventory. Each node should contain the product
name, product ID, quantity, and price.

Solution Guidelines:

1)     
Understand
and practice the following topics before developing this assignment::

          R Nodes

          R List

          R Linked
List

          RLinked
List Methods

2)      To save product
information, use the Linked List data structure. Each product will be
represented by a node.Do not use strcut . You have to
implement Node class . Using struct will result in deduction of marks

3)     
Your solution should use these classes:

 

a.      
Node
class: To save
information of each product

b.     
Inventory
Class: To save all
products in linked list

Sample Output

See the attached video file (output.mp4) to see
the sample output.

Solution:

#include<iostream>

using namespace std;

class Node{

string name;

int id;

int quantity;

double price;

Node* next;

public:

string getName()const;

int getId()const;

int getQuantity()const;

double getPrice()const;

Node* getNext()const;

void setName(string);

void setId(int);

void setQuantity(int);

void setPrice(double);

void setNext(Node*);

};

void Node::setNext(Node* next){

this->next = next;

}

void Node::setName(string name){

this->name = name;

}

void Node::setId(int id){

this->id = id;

}

void Node::setQuantity(int quantity){

this->quantity = quantity;

}

void Node::setPrice(double price){

this->price = price;

}

Node* Node::getNext()const{

return this->next;

}

string Node::getName()const{

return this->name;

}

int Node::getId()const{

return this->id;

}

int Node::getQuantity()const{

return this->quantity;

}

double Node::getPrice()const{

return this->price;

}

class Inventory{

Node* head;

public:

Inventory();

void addProduct(string name,int id,int quantity,double price);

void removeProduct(int);

void updateProduct(int,int,double);

void displayInventory()const;

};

Inventory::Inventory(){

head = NULL;

}

void Inventory::updateProduct(int id,int quantity,double price){

Node* newNode = head;

while(newNode != NULL){

if(newNode->getId() == id){

newNode->setQuantity(quantity);

newNode->setPrice(price);

cout<<"Product updated successfully"<<endl;

return;

}

newNode = newNode->getNext();

}

}

void Inventory::addProduct(string name,int id,int quantity,double price){

    Node* newNode =  new Node;

    newNode->setName(name);

    newNode->setId(id);

    newNode->setQuantity(quantity);

    newNode->setPrice(price);

    newNode->setNext(NULL);

    if (head == NULL) {

        head = newNode;

    } else {

        Node* last = head;

        while (last->getNext() != NULL) {

            last = last->getNext();

        }

        last->setNext(newNode);

    }

    cout << "Product added successfully." << endl;

}

void Inventory::removeProduct(int id) {

    if (head == NULL) {

        cout << "Inventory is Empty!" << endl;

        return;

    }

    if (head->getId() == id) {

        Node* temp = head;

        head = head->getNext();

        delete temp;

        cout << "Product removed successfully" << endl;

        return;

    }

    Node* newNode = head;

    while (newNode->getNext() != NULL) {

        if (newNode->getNext()->getId() == id) {

            Node* temp = newNode->getNext();

            newNode->setNext(newNode->getNext()->getNext());

            delete temp;

            cout << "Product Removed from inventory" << endl;

            return;

        }

        newNode = newNode->getNext();

    }

    cout << "Product not found in inventory" << endl;

}

void show(){

cout<<"Inventory:"<<endl

<<"Name   ID   Quantity   Price"<<endl;

}

void Inventory::displayInventory()const{

if(head == NULL){

cout<<"Inventory is empty!";

return;

}

show();

Node* newNode = head;

while(newNode != NULL){

cout<<newNode->getName()<<"";

cout<<"\t"<<newNode->getId()<<"";

cout<<"\t"<<newNode->getQuantity()<<"";

cout<<"\t"<<newNode->getPrice()<<"\n";

newNode = newNode->getNext();

}

}

int main(){

Inventory inv;

int choice,id,quantity,products;

string name;

double price;

do{

cout<<"Please choose an action:"<<endl

<<"1. Add product\n"

<<"2. Remove product\n"

<<"3. Update product\n"

<<"4. Display inventory\n"

<<"0. Exit\n";

cout<<"Enter your choice: ";

cin>>choice;

switch(choice){

case 1:

cout<<"How many products do you want to add? ";

cin>>products;

for(int i=0; i<products; i++){

cout<<"Enter product name: ";

cin.ignore();

getline(cin,name);

cout<<"Enter product ID: ";

cin>>id;

cout<<"Enter product quantity: ";

cin>>quantity;

cout<<"Enter product price: ";

cin>>price;

inv.addProduct(name,id,quantity,price);

}

break;

case 2:

cout<<"Enter product ID to remove: ";

cin>>id;

inv.removeProduct(id);

break;

case 3:

cout<<"Enter product ID to update: ";

cin>>id;

cout<<"Enter new quantity: ";

cin>>quantity;

cout<<"Enter new price: ";

cin>>price;

inv.updateProduct(id,quantity,price);

break;

case 4:

inv.displayInventory();

break;

case 0:

cout<<"Exiting Program...";

break;

}

cout<<endl;

}while(choice != 0);

return 0;

}