Question

Contents?

Introduction

Existing code & UML

UML

Code

Changes to be made to the program

tester_with_mods.cpp

Submit Instructions?

Introduction

The purpose of this assignment is to provide you with experience in working with objects in C++.

Existing code & UML

You have been provided with a class that describes the products maintained in a company’s inventory. The class maintains the following attributes:

Name of attribute

Data Type

productId

string

productPrice

float

Accessor and Mutator methods have been created for these attributes. Additionally, the class also contains a default constructor and a print function.

UML

The UML diagram for this class is as follows:

Code

The class’s .h, .cpp and the code that tests the class can be downloaded from clicking on this link or from BlackBoard. Code is shown below:

product.h

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#include <iostream>

#include <iomanip>

#include <stdio.h>

#include <string>

using namespace std;

class product

{

private:

string productId;

float productPrice;

public:

product(void);

void setProductId(string);

void setProductPrice(float);

string getProductId();

float getProductPrice();

void print();

};

product.cpp

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#include "product.h"

product::product(void)

{

productId = "--";

productPrice = 0.99f;

}

void product::setProductId(string _productId)

{

productId = _productId;

}

void product::setProductPrice(float _productPrice)

{

productPrice = _productPrice;

}

string product::getProductId()

{

return productId;

}

float product::getProductPrice()

{

return productPrice;

}

void product::print()

{

cout << setprecision(2) << fixed;

cout << "id=" << productId << ", Price= " << productPrice << endl;

}

tester_original.cpp

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#include <iostream>

using namespace std;

# include "product.h"

int main()

{

product product01;

product01.print();

return 0;

}

Output produced by this code is shown below:

Id = --, Price = $0.99

Press any key to continue . . .   

Changes to be made to the program

In order to complete the in-class assignment, you need to make the following changes to the object.

#

Change

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Place validation code in the mutator method for product price to ensure that no negative numbers are placed in price

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Add a string attribute to the object called aisleId.

Initialize it to “-none-“ in the constructor.

Create accessor and mutator methods for it. No validation code needs to be placed in the mutator function.

Print it out in the print function

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3

Create a class function called increasePriceBy15Percent.

It should increase product price by 15%

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The UML diagram of the completed assignment is as follows. New attributes and functions are highlighted. Functions circled in maroon need to be modified.

tester_with_mods.cpp

Download the new class tester program by clicking link , or from BB. Use it to test the product class after changes have been made to it.

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#include <iostream>

using namespace std;

# include "product.h"

int main()

{

product product01;

//------- object after instantiation ---------

cout << "---product01 after instantiation ---\n";

product01.print();

//--------- test setProductPrice --------

product01.setProductPrice(123.45);

cout << "\n---product01 after product01.setProductPrice(123.45) ---\n";

product01.print();

//--------- test negative setProductPrice --------

product01.setProductPrice(-51);

cout << "\n---product01 after product01.setProductPrice(-51) ---\n";

product01.print();

//-------- test setAisleId ----

product01.setAisleId("A12");

cout << "\n---product01 after product01.setAisleId(\"A12\") ---\n";

product01.print();

//-------- test increasePriceBy15Percent() -------

product01.increasePriceBy15Percent();

cout << "\n---product01 after product01.increasePriceBy15Percent() ---\n";

product01.print();

}

Sample output from my completed program is as follows:

---product01 after instantiation ---

id=--, Price= 0.99, Aisle Id = --none--

---product01 after product01.setProductPrice(123.45) ---

id=--, Price= 123.45, Aisle Id = --none--

-- Invalid product price --

---product01 after product01.setProductPrice(-51) ---

id=--, Price= 123.45, Aisle Id = --none--

---product01 after product01.setAisleId("A12") ---

id=--, Price= 123.45, Aisle Id = A12

---product01 after product01.increasePriceBy15Percent() ---

id=--, Price= 141.97, Aisle Id = A12

Submit Instructions

Submit one of the following via BlackBoard's submission tool.

Zipped solution folder created by Visual Studio

The following files

product.h

product.cpp

tester_with_mods.cpp

---product01 after instantiation ---

id=--, Price= 0.99, Aisle Id = --none--

---product01 after product01.setProductPrice(123.45) ---

id=--, Price= 123.45, Aisle Id = --none--

-- Invalid product price --

---product01 after product01.setProductPrice(-51) ---

id=--, Price= 123.45, Aisle Id = --none--

---product01 after product01.setAisleId("A12") ---

id=--, Price= 123.45, Aisle Id = A12

---product01 after product01.increasePriceBy15Percent() ---

id=--, Price= 141.97, Aisle Id = A12

Answer 1

//Definition for updated file product.h can be written as

#include <iostream>
#include <iomanip>
#include <stdio.h>
#include <string>
using namespace std;

class product
{
private:
string productId;
string aisleId; //Definition for aisleId
float productPrice;
public:
product(void);
void setProductId(string);
void setProductPrice(float);
void setAisleId(string); //Definition for mutator function

string getProductId();
float getProductPrice();
string getAisleId(); //Definition for accessor function

void print();
void increasePriceby15Percent(); //Definition for increase price by 15 percent
};

//Definition for the updated file product.cpp can be written as

#include "product.h"

product::product(void)

{

productId = "--";

productPrice = 0.99f;

strcpy(aisleId,"-none-"); //Initializing the value of aisleId

}

void product::setProductId(string _productId)

{

productId = _productId;

}

void product::setProductPrice(float _productPrice)

{

if(_productPrice>=0.0) //Validate for non-negative values

produtcPrice = _productPrice;

else

cout<<"\nWrong input";

}

//Mutator method for aisleId

void product::setAisleId(string _aisleId)

{

strcpy(aisleId, _aisleId);

}

string product::getProductId()

{

return productId;

}

float product::getProductPrice()

{

return productPrice;

}

//Accessor function for aisleId

string product::getAisleId()

{

return aisleId;

}

void product::print()

{

cout << setprecision(2) << fixed;

cout << "id=" << productId << ", Price= " << productPrice << endl;

}

//function to increase price by 15 percent

void increasePriceBy15Percent()

{

productPrice = productPrice+(productPrice*0.15);

}