Question

IN C++ PLEASE:

(1) Extend the ItemToPurchase class per the following specifications:

• Parameterized constructor to assign item name, item description, item price, and item quantity (default values of 0).
• Public member functions
  • SetDescription() mutator & GetDescription() accessor
  • PrintItemDescription() - Outputs the item name and description in the format name: description
• Private data members
  • string itemDescription - Initialized in default constructor to "none"

(2) Create three new files:

• ShoppingCart.h - Class declaration
• ShoppingCart.cpp - Class definition
• main.cpp - main() function (Note: main()'s functionality differs from checkpoint A)

Build the ShoppingCart class with the following specifications. Note: Some can be function stubs (empty functions) initially, to be completed in later steps.

• Default constructor
• Parameterized constructor which takes the customer name and date as parameters
• Private data members
  • string customerName - Initialized in default constructor to "none"
  • string currentDate - Initialized in default constructor to "January 1, 2016"
  • vector < ItemToPurchase > cartItems
• Public member functions
  • GetCustomerName() accessor
  • GetDate() accessor
  • AddItem()
    • Has parameter ItemToPurchase. Does not return anything.
    • Adds the item to cartItems vector as long as the quantity is not zero.
  • IsItemInCart()
    • Has a string (an item's name) parameter. Checks if that item is in cart. If so, returns True else False.
    • Has an integer parameter passed by reference. If the item exists, populates it with index in cartItems vector. ((I ESPECIALLY NEED HELP WITH THIS PART PLEASE)))
  • RemoveItem()
    • Removes item from cartItems vector. Has a string (an item's name) parameter. Does not return anything.
    • If item name cannot be found, output this message: Item not found in cart. Nothing removed.
  • ModifyItem()
    • Modifies an item's description, price, and/or quantity. Has parameter ItemToPurchase with updated data members. Does not return anything.
    • If item can be found (by name) in the cart, check if the input parameter has default values for data members: description, price, and quantity. If not, modify that data member of the item in cart.
    • If item cannot be found (by name) in cart, output this message: Item not found in cart. Nothing modified.
  • GetNumItemsInCart()
    • Returns quantity of all items in cart. Has no parameters.
  • GetCostOfCart()
    • Determines and returns the total cost of items in cart. Has no parameters.
  • PrintTotal()
    • Outputs total of objects in cart.
    • If cart is empty, output this message: SHOPPING CART IS EMPTY
  • PrintDescriptions()
    • Outputs each item's description.

Answer 1

//class ItemToPurchase definition

class ItemToPurchase {
    string itemDescription;

    public:
        string itemName;
        int itemPrice, itemQuantity;

        //Parameterized Constructor with default values
        ItemToPurchase(string itemName = "none", string itemDescription = "none", int itemPrice = 0, int itemQuantity = 0) {
            this.itemName = itemName;
            this.itemDescription = itemDescription;
            this.itemPrice = itemPrice;
            this.itemQuantity = itemQuantity;
        }

    void SetDescription(string itemDescription) {
        this.itemDescription = itemDescription;
    }

    string GetDescription() {
        return this.itemDescription;
    }

    void PrintItemDescription() {
        cout << this.itemName << ": " << this.itemDescription << endl;
    }
};

ShoppingCart.h

#ifndef SHOPPINGCART_H
#define SHOPPINGCART_H

class ShoppingCart : public ItemToPurchase{
    private :
        string customerName,currentDate;
        vector<ItemToPurchase> cartItems;

    public :
        ShoppingCart();
        ShoppingCart(string customerName,string date);
        
        string GetCustomerName();
        string GetDate();
    
        bool IsItemInCart(string itemName, int &index);
        void ModifyItem(ItemToPurchase item);
        void AddItem(ItemToPurchase item);
        void RemoveItem(string itemName);
        
        int GetNumItemsInCart();
        int GetCostOfCart();
        
        void PrintTotal();
        void PrintDescriptions();
};

#endif



ShoppingCart.cpp

#include<bits/stdc++.h>
#include"ShoppingCart.h"

using namespace std;

 //Default Constructor
ShoppingCart::ShoppingCart(){
    customerName="none";
    currentDate="January 1, 2016"
}

//parametrised Construtor
ShoppingCart::ShoppingCart(string customerName, string date){ 
    this.customerName = customerName;
    this.currentDate = date;
}

string ShoppingCart::GetCustomerName(){
    return customerName;
}

string ShoppingCart::GetDate(){
    return currentDate;
}

bool ShoppingCart::IsItemInCart(string itemName,int &index){
    bool found = false;
    int pos = 0;
    for(ItemToPurchase item : cartItems){
        if(item.itemName == itemName){
            found = true;
            index = pos;

            return found;
        }
        pos++;
    }
    
    return found;
}

void ShoppingCart::ModifyItem(ItemToPurchase item){
    int pos = -1;
    if( IsItemInCart(item.itemName, pos) ){
        // Modifies an item's description, price, and/or quantity. Has parameter ItemToPurchase with updated data members.
        cartItems[pos].SetDescription(item.GetDescription());
        cartItems[pos].itemPrice=item.itemPrice;
        cartItems[pos].itemQuantity=item.itemQuantity;
    }else{
        //Item cannot be found (by name) in cart, output this message:
        cout<<"Item not found in cart. Nothing modified.\n";
    }
}

void ShoppingCart :: AddItem(ItemToPurchase item){
    // Adds the item to cartItems vector as long as the quantity is not zero.
    if(item.itemQuantity!=0){
        cartItems.push_back(item);
    }
}

void ShoppingCart::RemoveItem(string itemName){
    int pos = -1;
    
    if( IsItemInCart(itemName, pos) ){
        cartItems.erase( cartItems.begin() + pos );
    }else{
        cout<<"Item not found in cart. Nothing removed.\n";
    }
}

int ShoppingCart::GetNumItemsInCart(){
    // Returns quantity of all items in cart. Has no parameters.
    int noOfItems = 0;
    for(ItemToPurchase item:cartItems){
        noOfItems += item.itemQuantity;
    }
    return noOfItems;
}

int ShoppingCart::GetCostOfCart(){
    // Determines and returns the total cost of items in cart.
    int totalCost = 0;
    for(ItemToPurchase item:cartItems){
        totalCost += (item.itemQuantity*item.itemPrice);
    }
    return totalCost;
}

void ShoppingCart::PrintTotal(){
    // Outputs total of objects in cart.
    if(cartItems.size() == 0){
        cout << "SHOPPING CART IS EMPTY\n";
    }else{
        cout << cartItems.size()<<"\n";
    }
}

void ShoppingCart::PrintDescriptions(){
    // Outputs each item's description.
    for(ItemToPurchase item:cartItems){
        cout << item.PrintItemDescription();
    }
}


main.cpp

#include<bits/stdc++.h>
#include"ShoppingCart.h"

using namespace std;

int main(){
    // your code  
            
    return 0;
}