ITECH1400 – Foundations of Programming - Caesar Ciphers & Turtle Graphics - IT/Computer Science Assignment Help

ASSIGNMENT TASK:

TASK:

Learning Outcomes Assessed

The following course learning outcomes are assessed by completing this assessment task: Knowledge

K1. Identify and use the correct syntax of a common programming language.
K2. Recall and use typical programming constructs to design and implement simple software solutions.
K4. Explain the importance of programming style concepts (documentation, mnemonic names, indentation).
 

Skills

S1. Utilise pseudocode and/or algorithms as a major program design technique.
S2. Write and implement a solution algorithm using basic programming constructs.
S4. Describe program functionality based on analysis of given program code.

Application of knowledge and skills

A1. Develop self-reliance and judgement in adapting algorithms to diverse contexts.
A2. Design and write program solutions to identified problems using accepted design constructs.

Assessment Details

Part one – Caesar Ciphers1

In this part you are to develop a Python application that will encrypt text from a file and also, given the key, decrypt text from a file. We shall use an easy cipher.

Shift ciphers, also known as Caesar ciphers, are obtained as follows:

XYZABCDEFGHIJKLMNOPQRSTUVW shifted alphabet

ABCDEFGHIJKLMNOPQRSTUVWXYZ original alphabet Now the word COAL becomes FRDO - in this case, we have encrypted using a key of 3. In the encryption mode, your application should ask the user for a filename which contains the plain text and the key to use for encryption. The decryption process is similar, but this time, the filename contains the encrypted text and when we give the key your application should return the original text (the arrows, shown above, go the other way). Ideally your application should be able to handle single words, sentences, paragraphs and even whole books2
.You need to demonstrate your application and show that it is working correctly by using tests that you design.

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