1811/2807/7001ICT Programming Principles, Trimester 1, 2021
Workshop 5
School of Information and Communication Technology
Grith University
April 11, 2021
Module 2
When Workshop 5
Goals In this workshop we create programs that use and/or dene func-
tions.
Marks 5
Due Both pre-workshop and workshop tasks shall be submitted online
using the submission links. Pre-workshop questions are due before
the start of this workshop; Workshop activity problems are due
by the start of the next workshop.
1 Preparation
Before your workshop class:
Read all of this document.
Review the lecture notes sections 1 to 16.
Complete the pre-workshop questions (1 mark) posted on the course website and sub-
mit the answers for marking.
Bring some paper (a print-out of this document is best) and writing implements.
Bring a storage device, such as a portable hard drive and cable, or a USB drive.
2 Electronic submission
Based on the feedback from students, we are moving to electronic submission and marking of workshops.
This means you don’t need to show your code for marking in the workshop anymore. Please submit
separate python les with names \problem1.py”, \problem2.py, …, using the submission link. Write
sucient comments in the les to help understanding of your codes.
Although face-to-face marking in the workshop is discontinued, please still attend the workshops if you
can. It is your best way to get help and feedback on your work.
3 Workshop activities
3.1 Marking last workshop’s problems
If you have problems that still need marking from the previous workshop, get them marked at the start
of this one.
1
3.2 Problem 1 (1 mark)
Problem: Write a program that prompts for and reads strings until a string starts with \A”
is entered, then prints the shortest string that was entered. The output must match the
punctuation in this example exactly (with quote marks).
$ python3 Shortest.py
Enter a string: Jaypher said, ‘It’s safer
Enter a string: you’ve lemons in your head;
Enter a string: First to eat, a pound of meat,
Enter a string: Find then to go at once to bed.
Enter a string: Eating meat is half the battle,
Enter a string: Will you hear the Lemons rattle!
Enter a string: If you don’t, you’ll always moan,
Enter a string: In a Lemoncolly tone;
Enter a string: For there’s nothing half so dreadful,
Enter a string: As Lemons in your head.
Shortest was: ‘In a Lemoncolly tone;’
$
Hint: use the sentinel pattern.
3.3 Problem 2 (1 mark)
Problem: Write a function that converts all digits in a string to underline.
Examples:
$ python3 convert.py
Input a string? Australia has 59,736 km coastal line.
Output: Australia has __,___ km coastal line.
Input a string? 10 x 10 = 20
Output: __ x __ = __
Input a string? 10 4 2
Output: __ _ _
$
3.4 Problem 3 (1 marks)
Problem: Given starting and ending years, write a function to calculate the number of days
from starting year to ending year inclusive.
Examples:
$ python3 day.py
Year 1? 1980
Year 2? 2020
Number of days: 14976
$
Hints: Write a function to check leap year. Sample code is the lecture notes of Section 10. Type Bool
and Boolean Expressions.
3.5 Problem 4 (1 mark)
Problem: Roll carpet comes in rolls 3.66 meters wide. Carpet is paid for by the total number
of whole metres that need to be cut from the roll. It may be laid in a rectangular room
lengthways or widthways. Either way there might be some wastage. The length of a room is
always its longer dimension and its width is always its shorter dimension.
2
waste
lengthways
waste
widthways
Write a program that repeatedly asks the user for room dimensions until either dimension
entered is zero or less. For each room print the length and width (to the nearest millimetre),
and the total length of carpet required in whole metres, both lengthwise and widthwise. For
example:
$ Python3 Carpet.py
Enter room dimension 1 (m): 2.5
Enter room dimension 2 (m): 5.5
Length = 5.500 m
Width = 2.500 m
Total length required lengthways = 6 m
Total length required widthways = 5 m
Enter room dimension 1 (m): 5.5
Enter room dimension 2 (m): 2.5
Length = 5.500 m
Width = 2.500 m
Total length required lengthways = 6 m
Total length required widthways = 5 m
Enter room dimension 1 (m): 0
Enter room dimension 2 (m): 0
Hints: use the sentinel pattern; make good use of standard library functions; and simplify your program
by writing a function to compute the total length required given two dimensions, and call it twice with
the dimensions in both orders.
4 After the workshop
You have created programs that might be useful to refer back to in future workshops. Make sure
that you will have that work in the future. One copy is not enough for at IT professional. You
should have at least 2 copies:
1. on your Grith network storage drive; and
2. on your portable storage device.
3
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