Lesson 4 - beginner exercise
For each scenario suggested below create the corresponding set of if statments. If you are finding it difficult you should create a truth tree diagram.
balance = 200
stock = 3
price = 50
def withdrawCash(amount):
if balance - amount < 0: return False
else: return True
def buyItem():
# will use widthdrawCash to see if they have enough money
# will also test to make sure ther is stock
# if both conditions are true then it will subtract price from balance
# and one from stock!
buyItem()
buyItem()
buyItem() # should print an error
Suggested change- Read the comments and add if statements to buyItem()
Toggle answer
username = "bob"
password = "pass"
failedAttempt = 0
def allowLogon(user, pass):
# will print "logged on" if user and pass match
# if they do not then a error is printed and failedAttempt is increments
# finally log on will always be disallowed if failed attempts >= 3
allowLogon("bob", "monkey")
allowLogon("bob", "passy")
allowLogon("bob", "punk")
allowLogon("bob", "pass") # will also fail even though correct!
Suggested change - Pay attention to the failed attemp
Toggle answer
teamAScore = 0
teamBScore = 0
def isGoal(inNet, offside, team):
# if isNet is true and offside is false then they score
# it will then add 1 to the correct teams score!
isGoal(True, True, "A")
isGoal(True, False, "A")
isGoal(False, False, "B")
isGoal(True, False, "B")
isGoal(True, False, "A")
print teamAScore # should be 2
print teamBScore # should be 1
Suggested changes - Make sure you test for the team name! This could get very complicated as there are a fair few possibilities./ However not all of them are used!
