C++

Inventory.cpp

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include "Inventory.h"
using namespace std;

// *******************************************************************
// setItemNumber() sets the value of the member variable itemNumber. *
// *******************************************************************
void Inventory::setItemNumber(int itemNum) {
    // Validates input for non-negative numbers
    if (itemNum >= 0) {
        itemNumber = itemNum;
    }
    else {
        cout << "Invalid item number.\n";
        exit(EXIT_FAILURE);
    }
}

// *******************************************************************
// setQuantity() sets the value of the member variable quantity.     *
// *******************************************************************
void Inventory::setQuantity(int q) {
    // Validates input for non-negative numbers
    if (q >= 0) {
        quantity = q;
    }
    else {
        cout << "Invalid quantity.\n";
        exit(EXIT_FAILURE);
    }
}

// *******************************************************************
// setCost() sets the value of the member variable cost.             *
// *******************************************************************
void Inventory::setCost(double c) {
    // Validates input for non-negative numbers
    if (c >= 0.0) {
        cost = c;
    }
    else {
        cout << "Invalid cost.\n";
        exit(EXIT_FAILURE);
    }
}

// *******************************************************************
// setTotalCost() sets the value of the member variable totalCost.   *
// *******************************************************************
void Inventory::setTotalCost(int q, double c) {
    double tempTotal = q * c;
    totalCost = tempTotal;
}

//            int getItemNumber();
//            int getQuantity();
//            double getCost();
//            double getTotalCost();

// *******************************************************************
// getItemNumber() returns value in the private member itemNumber    *
// *******************************************************************
int Inventory::getItemNumber() const {
    return itemNumber;
}

// *******************************************************************
// getQuantity() returns value in the private member quantity        *
// *******************************************************************
int Inventory::getQuantity() const {
    return quantity;
}

// *******************************************************************
// getCost() returns value in the private member cost                *
// *******************************************************************
double Inventory::getCost() const {
    return cost;
}

// *******************************************************************
// getTotalCost() returns value in the private member totalCost      *
// *******************************************************************
double Inventory::getTotalCost() const {
    return totalCost;
}

Inventory.h

#ifndef INVENTORY_H
#define INVENTORY_H

class Inventory {

        private:
            int itemNumber;
            int quantity;
            double cost;
            double totalCost;
        public:
            // Default Constructor
            Inventory() {
                itemNumber = 0;
                quantity = 0;
                cost = 0;
            }
            // Second Constructor
            Inventory(int itemNum, int q, double c) {
                itemNumber = itemNum;
                quantity = q;
                cost = c;
            }

            void setItemNumber(int);
            void setQuantity(int);
            void setCost(double);
            void setTotalCost(int, double);
            int getItemNumber() const;
            int getQuantity() const;
            double getCost() const;
            double getTotalCost() const;

    };

#endif // INVENTORY_H

mainInventory.cpp

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include "Inventory.h"

using namespace std;

int main() {

Inventory item;     // Define an instance of the inventory class
int itemNumber;     // Local variable for item number
int quantity;       // Local variable for quantity
double cost;        // Local variable for cost
double totalCost;   // Local variable for totalCost
int choice;         // Holds users menu choice

                    cout << "Calculating cost of an item's inventory.\n\n";
                    cout << "Enter the Item Number: ";
                    cin >> itemNumber;

                    cout << "Enter the Quantity on hand: ";
                    cin >> quantity;

                    cout << "What is this item's cost per unit? ";
                    cin >> cost;

                        // Store itemNumber, quantity and cost in item object
                        item.setItemNumber(itemNumber);
                        item.setQuantity(quantity);
                        item.setCost(cost);

                        // Set the total cost
                        item.setTotalCost(quantity, cost);

                    // Display results
                    cout << endl;
                    cout << "Item Number: " << item.getItemNumber() << endl;
                    cout << "Quantity: " << item.getQuantity() << endl;
                    cout << "Cost Per Item: " << item.getCost() << endl;
                    cout << "Total Cost: " << item.getTotalCost() << endl;

return 0;
}