Question

NEEDS TO BE IN PYTHON:

(The Rectangle class)

Following the example of the Circle class in Section 9.2, design a class named Rectangle to represent a rectangle. The class contains:

- Two data fields named width and height.
- A constructor that creates a rectangle with the specified width and height. The default values are 1 and 2 for the width and height, respectively.
- A method named getArea() that returns the area of this rectangle.
- A method named getPerimeter() that returns the perimeter.

Draw the UML diagram for the class, and then implement the class. Write a test program that creates two Rectangle objects—one with width 4 and height 40 and the other with width 3.5 and height 35.7. Display the width, height, area, and perimeter of each rectangle in this order.

Answer 1

UML Diagram for the Rectangle Class:

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Python Program:

class Rectangle:
   """
       Rectangle class
   """
  
   def __init__(self, width=1, height=2):
       """
           Constructor
       """
       # Initializing private variables
       self.__width = width;
       self.__height = height;
      
   def getWidth(self):
       """
           Function that returns width of a rectangle
       """
       return self.__width;
      
   def getHeight(self):
       """
           Function that returns height of a rectangle
       """
       return self.__height;
  
   def getArea(self):
       """
           Function that returns area of a rectangle
       """
       return self.__width * self.__height;
      
   def getPerimeter(self):
       """
           Function that returns perimeter of a rectangle
       """
       return 2 * (self.__width + self.__height);
      

def main():
   """
       Main function
   """
   # Creating object
   rect = Rectangle(4, 40);
  
   # Printing data
   print("\n A " + str(rect.getWidth()) + " x " + str(rect.getHeight()) + " rectangle has an area of " + str(rect.getArea()) + " and a perimeter of " + str(rect.getPerimeter()) + ". \n");
  
  
   # Creating object
   rect1 = Rectangle(3.5, 35.7);
  
   # Printing data
   print("\n A " + str(rect1.getWidth()) + " x " + str(rect1.getHeight()) + " rectangle has an area of " + str(rect1.getArea()) + " and a perimeter of " + str(rect1.getPerimeter()) + ". \n");
  

# Calling main function
main();   

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Code Screenshot:

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Sample Run: