CSC111 Exercises on Classes and Objects
--D. Thiebaut (talk) 13:05, 13 April 2014 (EDT)
Contents
Exercise 1
class Bob:
def __init__( self ):
self._a = None
def setA( self, x ):
self._a = x
def getA( self ):
return self._a
- Question 1
- Create an object of type Bob, call it x, and set its member variable to 4
- Question 2
- Add 10 to the member variable of x.
- Question 3
- print the object contents of Object x. First by getting _a from x and printing it, then by adding a new method to Bob so that we can print objects just by passing them to print()
Exercise 2
This exercise is very similar to Exercise 1, but the definition of self._a is now self.a. Answer the same 3 questions.
Exercise 3
- Question 1
- Create 2 objects of type Bob, each containing the values 45 and 70, respectively, and save them in a list called L
- Question 2
- Change the value of the first element of the list to 10, and the value of the second one to 20.
- Question 3
- Create 20 objects of type Bob, each containing 1, 2, 3,... 20, respectively, and save them in a list called L2
- Question 4
- Reset the values in all 20 objects in L2 to 0.
Exercise 4
This exercise is very similar to Exercise 3, but we construct a new class that contains a list of objects of type Bob. Answer the same questions as in Exercise 3.