Question

1a. Create a class named Inventory
- Separate declaration from implementation (i.e. Header and CPP files)
1b. Add the following private member variables
- a int variable named itemNumber
- an int variable named quantity
- a double variable named cost
- a double variable named totalCost. Total cost is defined as quantity X cost.
- updateTotalCost() which takes no arguments and sets the values of the variable totalCost.
1c. Add the following public functions:
- Accessor and Mutators for all private member variables
- getTotalCost which returns the value of totalCost
- Default constructor which sets all the member variables to 0. Finally, call the updateTotalCost function.
- A non-default constructor which accepts an item’s number, quantity, and cost as arguments. This constructor must calls the mutator functions to set the values of the appropriate member variables. Finally, call the updateTotalCost function.
1d. Write a main():
- Create an instance of type Inventory using the default constructor.
- Prompt the user to enter an itemNumber, cost, and quantity.
- Use the mutator methods to update itemNumber, cost, and quantity.
- Using the accessor functions, print the values of itemNumber, cost, quantity, and totalCost.
- Create a new instance of type Inventory using the non-default constructor.
- Using the accessor functions, print the values of itemNumber, cost, quantity, and totalCost.

Answer 1

Inventory.h

#ifndef Inventory_H #define Inventory_H class Inventory{       private:        int itemNumber;        int quantity;        double cost;        double totalCost;        void updateTotalCost();           public:        Inventory();        Inventory(int itn, int qty, double cost);        void setItemNumber(int itn);        int getItemNumber();        void setQuantity(int qty);        int getQuantity();        void setCost(double Cost);        double getCost();        double getTotalCost(); }; #include"Inventory.cpp" #endif

Inventory.cpp

#include"Inventory.h" Inventory::Inventory() {    itemNumber = 0;    quantity = 0;    cost = 0.0;    updateTotalCost(); } Inventory::Inventory(int itn, int qty, double cst) {    itemNumber = itn;    quantity = qty;    cost = cst;    updateTotalCost(); } void Inventory::setItemNumber(int itn) {    itemNumber = itn; } void Inventory::setQuantity(int qty) {    quantity = qty;    updateTotalCost(); } void Inventory::setCost(double Cost) {    cost = Cost;    updateTotalCost(); } int Inventory::getItemNumber() {    return itemNumber; } int Inventory::getQuantity() {    return quantity; } double Inventory::getCost() {    return cost; } double Inventory::getTotalCost() {    return totalCost; } void Inventory::updateTotalCost() {    totalCost = quantity * cost; }

Main.cpp

#include"Inventory.h" #include<iostream> using namespace std; int main() {    Inventory myInventory;    int itemNum, quantity;    double cost;    cout << "Enter the item number: ";    cin >> itemNum;    cout << "Enter the Quantity of the item: ";    cin >> quantity;    cout << "Enter the unit cost of the item: $";    cin >> cost;    myInventory.setItemNumber(itemNum);    myInventory.setQuantity(quantity);    myInventory.setCost(cost);    cout << endl;    cout << "Item number: " << myInventory.getItemNumber() << endl;    cout << "Quantity: " << myInventory.getQuantity() << endl;    cout << "Unit cost: $" << myInventory.getCost() << endl;    cout << "Total cost: $" << myInventory.getTotalCost() << endl;       cout << endl;    cout << "-- Testing the parameterized constructor --" << endl;    Inventory myInventory2(itemNum, quantity, cost);    cout << "Item number: " << myInventory2.getItemNumber() << endl;    cout << "Quantity: " << myInventory2.getQuantity() << endl;    cout << "Unit cost: $" << myInventory2.getCost() << endl;    cout << "Total cost: $" << myInventory2.getTotalCost() << endl; }

OUTPUT