Question

In C++

General Description: For this project, you will write a program that keeps track of inventory for a camera store. The data is located in the file Inventory.txt on the S:\ drive. While the program is running, the information should be stored in a linked list.

1. The information for each item will be stored in a struct a. The definition will be in a separate file called item.h

2. The total inventory will be stored in a linked list a. The definition of the list class will be in a file called dlist.h

3. The program should be able to perform the following functions

a. Display the inventory in alphabetical order by name

b. Display the inventory in reverse alphabetical order

c. Add an item to the inventory

d. Delete an item from inventory

e. Change any info for an item

i. Which means you have to be able to search for a particular item

4. The program will run until the user chooses an option to exit

5. The list is not in alphabetical order, so you will need to put it in order.

6. Whenever you change a name or if you add an item the list must stay in order.

7. When you are done, the list will be output to a file called newlist.txt

8. You must have internal and external documentation: See the handout on Documentation Standards

9. You will demonstrate your working project to me at an appointed time

10. You will hand in a copy of all your files, along with the documentation

This is the inventory

Telephoto-Pocket-Camera 54.95 15 20
Mini-Pocket-Camera 24.95 15 12
Polaroid-1Step-Camera 49.95 10 20
Sonar-1Step-Camera 189.95 12 13
Pronto-Camera 74.95 5 15
8MM-Zoom-Movie-Camera 279.99 10 9
8MM-Sound/ZoomMovieCamera 310.55 10 15
35MM-Minolta-SLR-XG-7-Camera 389.00 12 10
35MM-Pentax-SLR-AE-1-Camera 349.95 12 11
35MM-Canon-SLR-ME-Camera 319.90 12 20
35MM-Hi-Matic-Camera 119.95 12 13
35MM-Compact-Camera 89.99 12 20
Zoom-Movie-Projector 129.95 5 7
Zoom-Sound-Projector 239.99 5 9
Auto-Carousel-Projector 219.99 5 10
Carousel-Slide-Projector 114.95 5 4
Pocket-Strobe 14.95 5 4
StrobeSX-10 48.55 10 12
Electonic-Flash-SX-10 28.99 15 10
Tele-Converter 32.99 15 13
28MM-Wide-Angle-Lens 97.99 15 14
135MM-Telephoto-Lens 87.95 15 13
35-105MM-Zoom-Lens 267.95 5 8
80-200MM-Zoom-Lens 257.95 5 7
Heavy-Duty-Tripod 67.50 5 4
Lightweight-Tripod 19.95 5 10
35MM-Enlarger-Kit 159.99 5 10
40x40-Deluxe-Screen 35.98 5 4
50x50-Deluxe-Screen 44.98 5 10
120-Slide-Tray 4.29 25 17
100-Slide-Tray 2.95 25 33
Slide-Viewer 6.25 15 12
Movie-Editor 55.95 10 12
Condenser-Microphone 59.95 5 10
AA-Alkaline-Battery 0.89 100 80
Gadget-Bag 19.79 20 19
135-24-Color-Film 1.49 50 45
110-12-Color-Film 0.99 50 60
110-24-Color-Film 1.45 50 42
110-12-B/W-Film 0.59 25 37
110-24-B/W-Film 0.95 25 43
126-12-Color-Film 0.89 50 44
126-12-B/W-Film 0.59 25 27
8MM-Film-Cassette 6.89 50 39
16MM-Film-Cassette 11.89 20 25
Combination-Camera-Kit 959.99 12 10

Answer 1

struct Item{

string name;

double price;

int pixels;

int quantity;

};

dlist.h

#include<iostream>

using namespace std;

#include "item.h"

class DList{

public:

DList *head;

DList();

Item* createItem(string, double, int, int);

void insert(Item *);

void reverse();

int search(string);

void remove(string);

void print();

void write();

int change(string, Item*);

private:

Item *item;

DList *next;

};

dlist.cpp

#include "dlist.h"

DList::DList(){

head = NULL;

}

Item* DList::createItem(string name, double price, int pixels, int quantity){

Item *n_item = new Item;

n_item->name = name;

n_item->price = price;

n_item->pixels = pixels;

n_item->quantity = quantity;

return n_item;

}

void DList::insert(Item *item){

DList *tmpNode = new DList;

tmpNode->item = item;

tmpNode->next = NULL;

DList *currNode = head, *prevNode = NULL;

while (currNode != 0)

{

if (currNode->item->name > tmpNode->item->name)

break;

prevNode = currNode;

currNode = currNode->next;

}

if (prevNode == NULL)

{

head = tmpNode;

}

else

{

prevNode->next = tmpNode;

}

tmpNode->next = currNode;

}

void DList::reverse(){

DList *prev = NULL, *current = head, *next;

while (current != NULL)

{

next = current->next;

current->next = prev;

prev = current;

current = next;

}

head = prev;

}

int DList::search(string item){

DList *temp = head;

while(temp!=NULL){

if(temp->item->name==item)

return 1;

temp = temp->next;

}

return 0;

}

void DList::remove(string item){

if(head!=NULL){

DList *temp = head, *prev = NULL;

while(temp!=NULL){

if(temp->item->name==item)

break;

prev = temp;

temp = temp->next;

}

if(prev==NULL){

prev = head;

head = head->next;

delete prev;

}

else if(temp->next==NULL){

prev->next = NULL;

delete temp;

}

else{

prev->next = temp->next;

delete temp;

}

}

}

void DList::print(){

DList *temp = head;

while(temp!=NULL){

cout<<temp->item->name<<" "<<temp->item->price<<" "<<temp->item->pixels<<" "<<temp->item->quantity<<endl;

temp = temp->next;

}

}

int DList::change(string o_name, Item *item){

DList *temp = head;

while(temp!=NULL){

if(temp->item->name==o_name)

break;

temp = temp->next;

}

if(o_name==item->name){

if(item->price!=-1)

temp->item->price = item->price;

if(item->pixels!=-1)

temp->item->price = item->pixels;

if(item->quantity!=-1)

temp->item->quantity = item->quantity;

return 1;

}

return 0;

}

void DList::write(){

ofstream out("newlist.txt");

DList *temp = head;

while(temp!=NULL){

out<<temp->item->name<<" "<<temp->item->price<<" "<<temp->item->pixels<<" "<<temp->item->quantity<<endl;

temp = temp->next;

}

out.close();

}

main.cpp

#include<iostream>

#include<cstdlib>

#include<fstream>

#include "dlist.cpp"

using namespace std;

int main(){

ifstream in("Inventory.txt");

if(!in.is_open()){

cout<<"Unable to open file"<<endl;

exit(1);

}

string name;

double price;

int pixels, quantity;

DList *list = new DList();

while(!in.eof()){

in>>name>>price>>pixels>>quantity;

list->insert(list->createItem(name, price, pixels, quantity));

}

int option;

do{

cout<<"\nMENU"<<endl;

cout<<"1. Display the inventory in alphabetical order by name"<<endl;

cout<<"2. Display the inventory in reverse alphabetical order"<<endl;

cout<<"3. Add an item to the inventory"<<endl;

cout<<"4. Delete an item to inventory"<<endl;

cout<<"5. Change any info for an item"<<endl;

cout<<"6. Write into file"<<endl;

cout<<"7. exit"<<endl;

cout<<"Choose an option: ";

cin>>option;

switch(option){

case 1:

list->print();

break;

case 2:

list->reverse();

list->print();

list->reverse(); //to changed prev

break;

case 3:

{

cout<<"Adding new item: "<<endl;

cout<<"Enter item name: ";

cin>>name;

cout<<"Enter Price: ";

cin>>price;

cout<<"Enter Pixels";

cin>>pixels;

cout<<"Enter Quantiry";

cin>>quantity;

list->insert(list->createItem(name, price, pixels, quantity));

cout<<"Successfully New Item added to the list"<<endl;

}

break;

case 4:

{

cout<<"Enter item name to delete: ";

cin>>name;

if(list->search(name)){

list->remove(name);

cout<<"Item Successfully removed"<<endl;

}

else

cout<<"Item doesn't exists"<<endl;

}

break;

case 5:

{

string sname;

cout<<"Enter item name to change: ";

cin>>sname;

if(list->search(sname)){

cout<<"enter -1 to leave field"<<endl;

cout<<"item name: ";

cin>>name;

cout<<"Price: ";

cin>>price;

cout<<"Pixels: ";

cin>>pixels;

cout<<"Quantiry: ";

cin>>quantity;

if(!list->change(sname, list->createItem(name, price, pixels, quantity))){

list->remove(sname);

list->insert(list->createItem(name, price, pixels, quantity));

}

cout<<"Successfully changed info"<<endl;

}

else{

cout<<"Invalid item name"<<endl;

}

}

break;

case 6:

list->write();

cout<<"Successfully wirte into newfile.txt";

break;

case 7:

exit(0);

break;

}

}while(option!=7);

}