Question

// This program uses the programmer-defined Rectangle class.
#include "Rectangle.cpp"
#include <iostream>
using namespace std;
int main()
{

   Rectangle rectangle1;
   Rectangle rectangle2;

   rectangle1.setLength(10.0);
   rectangle1.setWidth(5.0);
   rectangle2.setLength(7.0);
   rectangle2.setWidth(3.0);

   cout << "Perimeter of rectangle1 is " << rectangle1.calculatePerimeter() << endl;
   cout << "Area of rectangle1 is " << rectangle1.calculateArea() << endl;
   cout << "Perimeter of rectangle2 is " << rectangle2.calculatePerimeter() << endl;
   cout << "Area of rectangle2 is " << rectangle2.calculateArea() << endl;

   return 0;
}

1. Ensure the class file named Rectangle.cpp is open in your editor.
2. In the Rectangle class, create two private attributes named length and width. Bothlength and width should be data type double.
3. Write public set methods to set the values for length and width.
4. Write public get methods to retrieve the values for length and width.
5. Write a public calculateArea()method and a public calculatePerimeter() method to calculate and return the area of the rectangle and the perimeter of the rectangle.
6. Open the file named MyRectangleClassProgram.cpp.
7. In the MyRectangleClassProgram, create two Rectangle objects named rectangle1 and rectangle2 using the default constructor as you saw in MyEmployeeClassProgram.cpp.
8. Set the length of rectangle1 to 10.0 and the width to 5.0. Set the length of rectangle2 to 7.0 and the width to 3.0.
9. Print the value of rectangle1’s perimeter and area, and then print the value of rectangle2’s perimeter and area.
10. Execute the program by clicking the Run button at the bottom of the screen

Answer 1

----------Rectangle.cpp-------

#include<iostream>

using namespace std;

class Rectangle{

    private:

       

        double length;

        double width;

       

    public:

       

        // constructor

        Rectangle()

        {

            this->length = 0.0;

            this->width = 0.0;

        }

       

        // constructor

        Rectangle(double length, double width)

        {

            this->length = length;

            this->width = width;

        }

       

        // seter method

        void setLength(double length)

        {

            this->length = length;

        }

       

        void setWidth(double width)

        {

            this->width = width;

        }

       

        // geter method

        double getLength()

        {

            return this->length;

        }

       

        double getWidth()

        {

            return this->width;

        }

        

        // calculate the area

        double calculateArea()

        {

            return this->length * this->width;

        }

       

        // calculate the perimeter

        double calculatePerimeter()

        {

            return 2.0 * ( this->length + this->width );

        }

};

-------------main.cpp------------

#include "Rectangle.cpp"

#include <iostream>

using namespace std;

int main()

{

   Rectangle rectangle1;

   Rectangle rectangle2;

   rectangle1.setLength(10.0);

   rectangle1.setWidth(5.0);

   rectangle2.setLength(7.0);

   rectangle2.setWidth(3.0);

   cout << "Perimeter of rectangle1 is " << rectangle1.calculatePerimeter() << endl;

   cout << "Area of rectangle1 is " << rectangle1.calculateArea() << endl;

   cout << "Perimeter of rectangle2 is " << rectangle2.calculatePerimeter() << endl;

   cout << "Area of rectangle2 is " << rectangle2.calculateArea() << endl;

   return 0;

}

Sample Output