Question

Use C++ to implement a program uses objected oriented programming to calculate the area of a rectangle. The program should create a Rectangle class that has the following attributes and member functions:

Attributes: width and length

Member functions: setWidth(), setLength(), getWidth() , getLength(), getArea()

Where width and length are the respect width and length of a Rectangle class. The setWidth() and setLength() member function should set the length and width, the getWidth(), getLenght(), and getArea() member function should get the length, width, and area. The program should

1. Ask the user for the length and width of rectangle. (5 points)

2. Output the length, width, and area of a rectangle. (10 points)

3. Continue to ask the user to calculate another rectangle area by asking length and width. (10 points)

Answer 1

SOURCE CODE IN C++:

#include <iostream>

using namespace std;

class Rectangle

{

private:

//instance variables

double width, length;

public:

//setter methods

void setWidth(double width)

{

    this->width=width;

}

void setLength(double length)

{

    this->length=length;

}

//getter methods

double getWidth()

{

    return width;

}

double getLength()

{

    return length;

}

double getArea()

{

    return length*width;

}

};

int main()

{

//testing

Rectangle rectangle;

double width, length;

do

{

    cout << "Enter width and length of Rectangle: "; //output prompt

    cin >> width >> length; //input width and length

    if(width>0 && length>0) //if dimensions are positive

    {

      //setting values

      rectangle.setWidth(width);

      rectangle.setLength(length);

      //getting values

      cout << "\nWidth of Rectangle: " << rectangle.getWidth() << "\n";

      cout << "Length of Rectangle: " << rectangle.getLength() << "\n";

      cout << "Area of Rectangle: " << rectangle.getArea() << "\n\n";

    }

}while(width>0 && length>0); //looping till negative or zero values are input

return 0;

}

OUTPUT:

Enter width and length of Rectangle: 4 5 Width of Rectangle: 4 Length of Rectangle: 5 Area of Rectangle: 20 Enter width and length of Rectangle: 36 Width of Rectangle: 3 Length of Rectangle: 6 Area of Rectangle: 18 Enter width and length of Rectangle: -1 -1

Regards!