Computer Science II Lab exercise set 5

CSC 242: Introduction to Computer Science II
Lab exercise set 5

Logistics
In order to receive full credit for the lab, you must attend the session, remain in the lab for at
least 45 minutes, and submit a file that contains solutions to all these exercises.
You are encouraged to work in groups on lab exercises. If you do work with someone, you must
include the name(s) of your collaborator(s) at the top of the file you submit. For more
information about collaboration policies in this class, see the Academic Integrity policy.
If you complete the lab exercise early, please review Chapter 9 in the textbook and work on the
fourth assignment or study for the midterm exam. You must remain in the lab for at least 45
minutes to earn full credit. You are only allowed to work on assignments with at most two-other
people, either directly or indirectly, who must be formally identified as part of your assignment
submission. Please see the assignment description and the course Academic Integrity pledge for
the full description of the process you must follow when completing assignments. If you need
additional help on the assignment, please ask the teaching assistant.
Submitting the exercises
You must submit your solutions to the exercises using the lab 5 dropbox on the D2L site. Submit
only a single Python file (e.g. csc242lab5.py) with each of the completed functions and classes
for the lab exercises in it. Submissions after the deadline listed above will be automatically
rejected by the system. See the syllabus for the grading policy.
Grading
The lab session is worth 10 points. If you complete the lab exercises before the end of the lab
session, please work on the fourth assignment. Remember that the rules for collaboration on
assignments is different from labs. Please review the Academic Integrity policy for more
information. If you have questions about the assignment, please ask the teaching assistant for
help.
Problem 1:
Develop a class BankAccount that supports these methods: 
• __init__():Initializes the bank account balance to the value of the input argument, or to 0
if no input argument is given
• withdraw(): Takes an amount as input and withdraws it from the balance. Balance cannot
go below 0. Returns true or false if successful.
• deposit(): Takes an amount as input and adds it to the balance. Returns true or false if
successful
• balance(): Returns the balance on the account
Problem 2:
Take the class from problem 1 and use it in a GUI class named ATM that has the following behaviors. You
must use the class from Problem 1 to manipulate the account. The Entry box should clear after each
transaction.
Click withdraw:
Click Deposit: