Skip to content

Latest commit

 

History

History
193 lines (119 loc) · 3.49 KB

Day_13.md

File metadata and controls

193 lines (119 loc) · 3.49 KB
Raw

Question 47

Question

Define a class named Circle which can be constructed by a radius. The Circle class has a method which can compute the area.

Hints

Use def methodName(self) to define a method.

Main author's Solution: Python 2

class Circle(object):
    def __init__(self, r):
        self.radius = r

    def area(self):
        return self.radius**2*3.14

aCircle = Circle(2)
print aCircle.area()

My Solution: Python 3

class Circle():
    def __init__(self,r):
        self.radius = r

    def area(self):
        return 3.1416*(self.radius**2)


circle = Circle(5)
print(circle.area())

Question 48

Question

Define a class named Rectangle which can be constructed by a length and width. The Rectangle class has a method which can compute the area.

Hints

Use def methodName(self) to define a method.

Main author's Solution: Python 2

class Rectangle(object):
    def __init__(self, l, w):
        self.length = l
        self.width  = w

    def area(self):
        return self.length*self.width

aRectangle = Rectangle(2,10)
print aRectangle.area()

My Solution: Python 3

class Rectangle():
    def __init__(self,l,w):
        self.length = l
        self.width = w

    def area(self):
        return self.length*self.width


rect = Rectangle(2,4)
print(rect.area())

Question 49

Question

Define a class named Shape and its subclass Square. The Square class has an init function which takes a length as argument. Both classes have a area function which can print the area of the shape where Shape's area is 0 by default.

Hints

To override a method in super class, we can define a method with the same name in the super class.

Main author's Solution: Python 2

class Shape(object):
    def __init__(self):
        pass

    def area(self):
        return 0

class Square(Shape):
    def __init__(self, l):
        Shape.__init__(self)
        self.length = l

    def area(self):
        return self.length*self.length

aSquare= Square(3)
print aSquare.area()

My Solution: Python 3

class Shape():
    def __init__(self):
        pass

    def area(self):
        return 0

class Square(Shape):
    def __init__(self,length = 0):
        Shape.__init__(self)
        self.length = length

    def area(self):
        return self.length*self.length

Asqr = Square(5)
print(Asqr.area())      # prints 25 as given argument

print(Square().area())  # prints zero as default area

Question 50

Question

Please raise a RuntimeError exception.

Hints

UUse raise() to raise an exception.

Solution:

raise RuntimeError('something wrong')

Conclusion

Well It seems that the above problems are very much focused on basic concpets and implimantation of object oriented programming.As the concepts are not about to solve any functional problem rather design the structure , so both codes are very much similar in there implimantation part.

go to previous day

go to next day

Discussion