CPSC 231: Assignment 1

New Concepts to be applied for the assignment

• Learning how to complete common tasks using UNIX and creating a simple Python program

Part I: Introduction to UNIX, using common commands (18 marks)

On the UNIX workstations in the Computer Science lab complete the following steps:

1. Login to your UNIX account*

2. Start a script session *

3. Show the contents of your home directory

4. Show your location (path) in the UNIX file system

5. Make a new directory called '231'

6. Show the contents of your home directory

7. Enter the newly created ‘231’ directory

8. Show the contents of the newly created ‘231’ directory

9. Show your location (path) in the UNIX file system

10. Go to the official directory for CPSC 231 (/home/231)

11. Show the contents of the CPSC 231 directory

12. Show your location (path) in the UNIX file system

13. Go to the directory for Assignment 1 (/home/231/assignments/assignment1)

14. Show the contents of the Assignment 1 directory

15. Show your location (path) in the UNIX file system

16. Display the contents of the file called 'index.txt' onscreen.  Show the file one screen a screen at a time (with a prompt for the user to continue) rather than all at once.  [JT's comment: This step may result in a small amount of 'garbage' or nonsense text appearing on your paper printout.  If the garbage only appears for this step (partway through the display of this file) and/or each of your steps is clear enough for your marker to see each distinct step then you can still get full marks for this assignment.]

17. Try to delete the 'index.txt' file [JT's Hint: you aren't supposed to be able to complete this step successfully but instead you should get an error message.]

18. Copy the file to the newly created ‘231’ directory that you created in your home directory

19. Go to the 231 directory that is located in your home directory

20. Show the contents of the ‘231’ directory.  (It should include the file 'index.txt' now.)

21. End the script session*

22. Submit your assignment (the file called "typescript" using the submission mechanism described on the course web page [UNIX submit program]).*

The lines marked with a star '*' don't directly yield any marks but must still be completed in order for this part of the assignment to be marked.

Part II: Creating your first Python program (12 marks)

You are to write a Python program that will implement the compound interest formula: amount = principle * (1 + interest)^time. This program will prompt the user for the amount to be invested (principle), the number of years to invest the money (time) and the yearly interest rate. The user should be able to enter the interest rate as an integer value (e.g., 11% instead of 0.11%). Only fractional interest rates will require a real number value to be entered (e.g., 3.25%). The program will only display two fractional digits for amount.

Marking: