Hello I need help with this C++ assignment. Modify the code to implement in two separate files: in a header file Rectangle.h - A complete Rectangle Class including both declaration and definition and a .cpp file. The code should run like this as the capture. In other words, change the code to display the area of a rectangle modifying the code below. Thanks.

Code needed to be modified:

#include

#include

using namespace std;

// Rectangle class declaration.

class Rectangle

{

private:

double width;

double length;

public:

void setWidth(double);

void setLength(double);

double getWidth() const;

double getLength() const;

double getArea() const;

};

//**************************************************

// setWidth assigns a value to the width member. *

//**************************************************

void Rectangle::setWidth(double w)

{

width = w;

}

//**************************************************

// setLength assigns a value to the length member. *

//**************************************************

void Rectangle::setLength(double len)

{

length = len;

}

//**************************************************

// getWidth returns the value in the width member. *

//**************************************************

double Rectangle::getWidth() const

{

return width;

}

//****************************************************

// getLength returns the value in the length member. *

//****************************************************

double Rectangle::getLength() const

{

return length;

}

//*****************************************************

// getArea returns the product of width times length. *

//*****************************************************

double Rectangle::getArea() const

{

return width * length;

}

//*****************************************************

// Function main *

//*****************************************************

int main()

{

double number; // To hold a number

double totalArea; // The total area

// Dynamically allocate the objects.

unique_ptr kitchen(new Rectangle);

unique_ptr bedroom(new Rectangle);

unique_ptr den(new Rectangle);

// Get the kitchen dimensions.

cout

cin >> number; // Get the length

kitchen->setLength(number); // Store in kitchen object

cout

cin >> number; // Get the width

kitchen->setWidth(number); // Store in kitchen object

// Get the bedroom dimensions.

cout

cin >> number; // Get the length

bedroom->setLength(number); // Store in bedroom object

cout

cin >> number; // Get the width

bedroom->setWidth(number); // Store in bedroom object

// Get the den dimensions.

cout

cin >> number; // Get the length

den->setLength(number); // Store in den object

cout

cin >> number; // Get the width

den->setWidth(number); // Store in den object

// Calculate the total area of the three rooms.

totalArea = kitchen->getArea() + bedroom->getArea() +

den->getArea();

// Display the total area of the three rooms.

cout

return 0;

}

This program will calculate the area of a rectangle. What is the width? 3 What is the length? 4 Here is the rectangle's data: Width: 3 Length: 4 Area: 12 Process returned 0 (0x0) execution time : 4.500 s Press any key to continue