Question

Create a class called Cuboid in a file called cuboid.py. The constructor should take parameters that sets a private variable for each side of the cuboid. Overload the following operators: +, -, <, >, ==, len(), and str(). Return a cuboid with the appropriate volume for the arithmetic operators. Use the volume of the cuboid to determine the output of the overloaded comparison operators. Use the surface area of the cuboid to calculate the result of len(). For str() return a string that displays the side lengths, volume, and surface area. Let the user enter values used to create two Cuboid objects. Then print out all results of the overloaded operators (using the operator, not calling the dunder method). Create a file called assn14-task1.py that contains a main() function to run your program. It is fine for the program to only run once then end. You DO NOT need to create loop asking use if they want to "Play Again".

Note: The most complicated part of this is the + and -. Remember that arithmetic operators should return the same type as the operands, so a cuboid should be returned. The returned cuboid is based on the volume, which means you'll need to figure out what the side lengths should be. They can be anything valid.

 

Rubric

5 pts: All operators overloaded properly

5 pts: Print results using the overloaded operators

5 pts: Proper output

Note: No software dev plan or UML required

Answer 1

Thanks for the question.

Below is the code you will be needing  Let me know if you have any doubts or if you need anything to change.

Thank You !

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class Cuboid():

    def __init__(self, length, width, height):
        self.__length = length
        self.__width = width
        self.__height = height

    def getLength(self): return self.__length

    def getWidth(self): return self.__width

    def getHeight(self): return self.__height

    def __add__(self, other):
        length = self.__length + other.getLength()
        width = self.__width + other.getWidth()
        height = self.__height + other.getHeight()
        return Cuboid(length, width, height)

    def __sub__(self, other):
        length = self.__length - other.getLength()
        width = self.__width - other.getWidth()
        height = self.__height - other.getHeight()
        return Cuboid(abs(length), abs(width), abs(height))

    def __lt__(self, other):
        v1 = self.__length * self.__width * self.__height
        v2 = other.getLength() * other.getWidth() * other.getHeight()
        return v1 < v2

    def __gt__(self, other):
        v1 = self.__length * self.__width * self.__height
        v2 = other.getLength() * other.getWidth() * other.getHeight()
        return v1 > v2

    def __eq__(self, other):
        v1 = self.__length * self.__width * self.__height
        v2 = other.getLength() * other.getWidth() * other.getHeight()
        return v1 == v2

    def __len__(self):
        surface_area = 2 * (self.__length * self.__width) + \
                       2 * (self.__length * self.__height) + \
                       2 * (self.__width * self.__height)
        return int(surface_area)

    def __str__(self):
        v1 = self.__length * self.__width * self.__height
        return 'Sides:[{},{},{}], Volume:{:.2f}, Surface Area:{:.2f}'.format(
            self.__length, self.__width, self.__height, v1, self.__len__()
        )

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from cuboid import Cuboid


def main():
    length = float(input('Enter length for cuboid 1: '))
    width = float(input('Enter length for width 1: '))
    height = float(input('Enter length for height 1: '))

    cuboid_one = Cuboid(length, width, height)

    length = float(input('Enter length for cuboid 2: '))
    width = float(input('Enter length for width 2: '))
    height = float(input('Enter length for height 2: '))

    cuboid_two = Cuboid(length, width, height)

    print('First Cuboid: ', cuboid_one)
    print('Second Cuboid: ', cuboid_two)

    print('First Cuboid + Second Cuboid:', cuboid_two + cuboid_one)
    print('First Cuboid - Second Cuboid:', cuboid_one - cuboid_two)
    print('First Cuboid < Second Cuboid:', cuboid_one < cuboid_two)
    print('First Cuboid == Second Cuboid:', cuboid_one == cuboid_two)
    print('Cuboid One Length: ', len(cuboid_one))
    print('Cuboid Two Length: ', len(cuboid_two))


main()

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