Question

In C++

Write a header cashRegister.h and source cashRegister.cpp files for the a CashRegister class. The class a CashRegister class has the following data members: 1) an array of 100 Item objects. 2) Cash Register Name and 3) Count of Item objects purchased. 4) Item Cash Total 5) State Tax Rate. The Item is represented as a class in an item.h file. The Item class has the following data members: 1) Name of the item 2) Cost of the item. In addition, provide the following member function prototypes for the CashRegister class

• CashRegister Default Constructor Function
• CashRegister  Overloaded Constructor Function that takes the register name and state tax rate.
• purchase(..) member function that takes an Item object and returns a boolean value (true: number of purchases does not exceed the limit, otherwise false). – Make sure not to exceed 100 items.
• printTotal() a constant function that prints the cash total (include tax) of all the items purchased on the screen and returns nothing

#pragma once //item.h file

//Place code here for Item class

///////////////////////////////////////////////////

#pragma once //cashRegister.h file

//Place code here for CashRegister class

Answer 1

/*
* cashRegister.h
*
* Created on: 25-Jul-2020
* Author:
*/

#ifndef CASHREGISTER_H_
#define CASHREGISTER_H_
#include "item.h"
#include <iostream>
using namespace std;

class CashRegister {
   Item *item[100];
   string name;
   int count;
   double total;
   double taxRate;
public:
   /**
   * default constructor
   * set all attribute to 0
   */
   CashRegister();

   /**
   * overloaded constructor
   * @param name of cashregister to be set
   * @param rate
   */
   CashRegister(string name, double rate);

   /**
   * purchase an item and add it to array list
   * @param item to be purchase
   */
   bool purchase(Item &item);

   /**
   * print total amount including taxRate
   */
   void printTotal();
   virtual ~CashRegister();
};

#endif /* CASHREGISTER_H_ */

/*
* cashRegister.cpp
*
* Created on: 25-Jul-2020
* Author:
*/

#include "cashRegister.h"

CashRegister::CashRegister() {
   this->count = 0;   // set count to 0
   this->name = "";   // set register name to empty string
   this->total = 0;   // set total amount to 0
   this->taxRate = 0;    // set default tax rate to 0
}

CashRegister::CashRegister(std::string name, double rate){
   this->count = 0; // set count to 0
   this->name = name; // set name
   this->total = 0; // set total amount to 0
   this->taxRate = rate; // set rate to given rate
}

bool CashRegister::purchase(Item &item){
   if (this->count > 100){
       return false; // return false if item list is full
   }

   this->item[count] = &item; // add an item in list
   this->count+=1; // increase counter variable by one
   return true; // return true if successfully added
}

void CashRegister::printTotal(){
   // calculate to amount to be pay
   for (int i=0; i<this->count; i++){
       this->total += this->item[i]->getCost();
   }
   double taxAmt = this->total * this->taxRate / 100;
   this->total += taxAmt;
   cout<<"Total amount(including tax): "<<this->total<<endl;
}

CashRegister::~CashRegister() {}

/*
* item.h
*
* Created on: 25-Jul-2020
* Author:
*/

#ifndef ITEM_H_
#define ITEM_H_
#include <iostream>
using namespace std;

class Item {
   string name;
   double cost;
public:

   /**
   * default constructor
   */
   Item();

   /**
   * overloaded constructor
   * @param name of item
   * @param cost of item
   */
   Item(std::string name, double cost);

   /**
   * get name of item
   * @return name of item
   */
   string getName();

   /**
   * set name of item
   * @param name of item to be set
   */
   void setName(string name);

   /**
   * get cost of item
   * @return cost of item
   */
   double getCost();

   /**
   * set cost of item
   * @param cost of item
   */
   void setCost(double cost);
   virtual ~Item();
};

#endif /* ITEM_H_ */

/*
* item.cpp
*
* Created on: 25-Jul-2020
* Author:
*/

#include "item.h"

Item::Item() {
   this->cost = 0;
   this->name = "";
}

Item::Item(std::string name, double cost){
   this->cost = cost; // set cost of item
   this->name = name; // set name of item
}

double Item::getCost(){
   return this->cost; // return cost of item
}

void Item::setCost(double cost){
   this->cost = cost; // set cost of item
}

string Item::getName(){
   return this->name; // return name of item
}

void Item::setName(string name){
   this->name = name; // set name of item
}

Item::~Item() {}

/*
* main.cpp
*
* Created on: 23-Jul-2020
* Author:
*/

#include <iostream>
#include "cashRegister.h"

using namespace std;

int main(){
   CashRegister c("cRegister", 5.0); // create object of CashRegister class

   Item item1("Scale", 25);            // create item1
   Item item2("Tie", 10);                // create item2
   Item item3("Undergarments", 50);    // create item3
   Item item4("Cap", 70);                // create item4
   c.purchase(item1);                    // purchase item1
   c.purchase(item2);                    // purchase item2
   c.purchase(item3);                    // purchase item3
   c.purchase(item4);                    // purchase item4

   c.printTotal();        // print total amount of item
}

Output:

Total amount (including tax): 162.75