Question

struct Item {

string name; int quantity; float cost;

};
const int MAX_SIZE = 50;

class ManageInventory {
public:

ManageInventory() : count{0}, p_pInventoryItems {new Item*[size]} { }

ManageInventory(int size) : size{size}, count{0}, p_pInventoryItems {new Item*[size]} { }

~ManageInventory();
void addItem(string name, int quantity, float cost);

private:
int size {MAX_SIZE};

int count;

Item ** p_pInventoryItems; };

1. Write the definition for addItem. Use the new operator to dynamically create instances of type Item. Store pointers to inventory items in the inventoryItems array.

2. Write the ManageInventory class destructor definition. Use the delete operator to dynamically destroy all Item objs stored in the inventoryItems array.

Answer 1

#include<string>
#include<iostream>
using namespace std;
struct Item {

  string name;
  int quantity;
  float cost;

};
const int MAX_SIZE = 50;

class ManageInventory {
  public:

    ManageInventory(){
      count = 0;
      // creating inventory of max size
      p_pInventoryItems = new Item [MAX_SIZE];
    }

  ManageInventory(int size) {
      count = 0;
      // creating inventory of given size
      p_pInventoryItems = new Item [size];
  }

    ~ManageInventory(){
        cout<<"destructor called\n";
        // deleting dynamically array
        delete [] p_pInventoryItems;
    }
  void addItem(string name, int quantity, float cost){
      // creating struct of inventory
      
      Item item;
      item.name = name;
      item.quantity = quantity;
      item.cost = cost;
      // adding to array and incrementing counter
      p_pInventoryItems[count++] = item;
  }

// added function for priting inventory
  void printItems(){
      for(int i=0;i<count;i++){
          cout<<p_pInventoryItems[i].name<<"\t"<<p_pInventoryItems[i].quantity<<"\t"<<p_pInventoryItems[i].cost<<endl;
      }
  }

  private:
        int count;
        Item * p_pInventoryItems;

 
};

// below function for are testing purpose only
int main(){
    // created object
    ManageInventory inv;
    inv.addItem("milk", 4, 45.67);
    inv.addItem("water", 2, 10.5);
    inv.printItems();
    return 0;
}

//OUT

Please do comment if u have any concern...