Question

Write the method addItemToStock to add an item into the grocery stock array. The method will: • Insert the item with itemName add quantity items to stock. • If itemName is already present in stock, increase the quantity of the item, otherwise add new itemName to stock. • If itemName is not present in stock, insert at the first null position in the stock array. After the insertion all items are adjacent in the array (no null positions between two items). • Additionally, double the capacity of the stock array if itemName is a new item to be inserted and the stock is full.

Answer 1

Answer:

#include <stdio.h>

#include <iostream>

using namespace std;

int main()

{

   //varible to indicate size of the array

   int size=20;

   //arrays to hold grocery item names and their quantities

   std::string grocery_item[size];

   int item_stock[size];

   //variables to hold user input

   std::string itemName;

   int quantity;

   //variable to check if item is already present

   bool itemPresent=false;

   //variable holding full stock value

   int full_stock=100;

   for(int n=0; n<size; n++)

   {

       grocery_item[n]="";

       item_stock[n]=0;

   }

   do

   {

       std::cout << endl<<"Enter the grocery item to be added(enter q to quit): ";

       cin>>itemName;

       if(itemName=="q")

       {

               cout<<"Program ends..."<<endl; break;

       }

       else

       {

           std::cout << "Enter the grocery item stock to be added: ";

           cin>>quantity;

       }

   for(int n=0; n<size; n++)

   {

       if(grocery_item[n]==itemName)

       {

           itemPresent=true;

           item_stock[n]=item_stock[n]+quantity;

       }

   }

   if(itemPresent==false)

   {

       for(int n=0; n<size; n++)

       {

           if(grocery_item[n]=="")

           {

               itemPresent=true;

               grocery_item[n]=itemName;

               item_stock[n]=item_stock[n]+quantity;

           }

       

           if(item_stock[n]==full_stock)

           {

               item_stock[n]=item_stock[n]*2;

           }

       }

   }

   }while(itemName!="q");

   return 0;

}

OUTPUT

Enter the grocery item to be added(enter q to quit): rice

Enter the grocery item stock to be added: 23

Enter the grocery item to be added(enter q to quit): bread

Enter the grocery item stock to be added: 10

Enter the grocery item to be added(enter q to quit): bread

Enter the grocery item stock to be added: 12

Enter the grocery item to be added(enter q to quit): q

Program ends...

Explanation:

1. The length of the array and the level of full stock has been defined inside the program.

2. Program can be tested for varying values of length of array and full stock level.

3. The variables are declared outside the do-while loop.

4. Inside do-while loop, user input is taken. The loop runs until user opts to quit the program.

5. Inside do-while loop, the logic for adding the item to the array and adding the quantity to the stock has been included. For loops have been used for arrays.

6. The program only takes user input for the item and the respective quantity to be added.