Sudaraka Wijesinghe said:
Q: What are some everyday systems that exhibit flow control?
Menu driven devices like cell phones, DVD players, ATMs.
Q: Can you think of some examples where True/False logic may be too constraining?
Evaluation of a value or expression that can have more than two states, i.e selecting an item from a list (menu).
My py4int exercise 3 code
Exercise 3.1 and 3.2
try:
# Get hours from the user
hours = raw_input('Enter number of ours: ')
f_hours = float(hours)
# Get rate from the user
rate = raw_input('Enter rate per hour: ')
f_rate = float(rate)
except:
print 'Error, please enter numeric input'
quit()
# Calculate pay/bonus
if f_hours > 40 :
pay = f_rate * 40 + f_rate * 1.5 * (f_hours - 40)
else:
pay = f_hours * f_rate
# Output calculated pay
print 'Gross pay:',pay
Exercise 3.3
# Get score from user
inp = raw_input('Enter score: ')
try:
score = float(inp)
except:
print 'Bad score'
quit()
# Make sure score is less than one
if 1 < score or 0 > score :
print 'Bad score'
quit()
if 0.9 < score :
print 'A'
elif 0.8 < score :
print 'B'
elif 0.7 < score :
print 'C'
elif 0.6 < score :
print 'D'
else:
print 'F'
My py4int exercise 5 code
Exercise 5.1
# Initialize variables
count = 0
total = 0.0
while 1 :
inp = raw_input ('Enter a number: ')
if 'done' == inp :
break
try:
total = total + float(inp)
# increase count after total to avoid incorrect count increases on bad inputs
count = count + 1
except:
print 'Invalid input'
# Avoid zero division
if 0 < count :
print 'Total:', total, ' Count:', count, ' Average', total/count
else:
print 'No numbers entered'
Exercise 5.2
# Initialize variables
max_val = None
min_val = None
while 1 :
inp = raw_input ('Enter a number: ')
if 'done' == inp :
break
try:
value = float(inp)
# Check for minimum
if min_val is None :
min_val = value
elif min_val > value :
min_val = value
# Check for maximum
if max_val is None :
max_val = value
elif max_val < value :
max_val = value
except:
print 'Invalid input'
print 'Maximum:', max_val, ', Minimum:', min_val
on June 25, 2011, 5:14 p.m.
