Question

Write a complete C++ program as described below. Documentation is required; see section.

Starter code and input files are given to you. Please go through them on Titanium before beginning to program.

Each item that is scanned at a cash register reduces the grocery store’s inventory – i.e., the number of items decreases by one. Your program should code this logic.

A text file contains the initial inventory (i.e., number of items) of every type of item carried in the store in the following format:

23043 Apple       6

74001 Coke        12

10078 Eggs_6ct    10

10079 Eggs_12ct   6

34302 Milk_1qt    5

59004 Bread_wheat 5

Column 1 is the item code, column 2 is the item name, and column 3 is the number of items.

The list of scanned items is represented by an array of item codes (integers). For example, if the array is: [34302, 10078, 34302], the inventory after scanning should be printed as:

Apple   6

Coke 12

Eggs_6ct 9

Eggs_12ct 6

Milk_1qt 3

Bread_wheat 5

Implement your logic within a class GroceryInventory. The class should have the following public member functions:

• GroceryInventory(string filename): the constructor which takes in the filename of the initial inventory and reads in the data to its member variables
• int printInventory(int itemcodes[], int nItems): given an array of item codes, print the reduced inventory in the format shown above and returns the total number of items (41 in the example above)

These public member functions will be called from the provided main program and the answers printed there (see file part2.cpp)

You are free to add other (public/private) member variables and functions to class GroceryInventory as needed.

• You can implement all your code either in one header file called GroceryInventory.h or split the declaration and definition in GroceryInventory.h and GroceryInventory.cpp
• Class and filenames are case-sensitive. The class and filenames should be GroceryInventory (not Groceryinventory, groceryinventory, …)

Answer 1

Note: part2.cpp is not provided in the question

Code for the above program is provided below. If any double, please comment below.

GroceryInventory.h

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

// Declaration of class
class GroceryInventory
{
   int itemCode[10];
   string itemName[10];
   int numOfItems[10];
   int count;
public:

   // Read data from file
   GroceryInventory(string filename)
   {
       // Open the file
       ifstream in;
       in.open(filename);
       int i=0;

       // Read values to array
       while(in>>itemCode[i])
       {
           in>>itemName[i];
           in>>numOfItems[i];
           i++;
       }
       // Total items
       count=i;
   }

   // Print the values
   int printInventory(int itemcodes[], int nItems)
   {

       // Parse through the list of scanned items
       for(int j=0;j<nItems;j++)
       {
           // Check the itemcode
           for(int i=0;i<count;i++)
           {
               // Decrement scanned item count
               if(itemcodes[j]==itemCode[i])
                   numOfItems[i]--;
           }
       }
       int tot=0;

       // Print each item
       for(int i=0;i<count;i++)
       {
           cout<<itemName[i]<<" "<<numOfItems[i]<<endl;

           // Find total items
           tot=tot+numOfItems[i];
       }
       return tot;
   }
};

part2.cpp

#include<iostream>
#include"GroceryInventory.h"
using namespace std;
int main()
{
   GroceryInventory gr("inp.txt");
   // Array of scanned items
   int arr[3]={34302,10078,34302};
   int count=gr.printInventory(arr,3);
   // Print the total
   cout<<"Total items = "<<count<<endl;
   system("pause");
}

Output: