CS 115 Lab 2, Part A: Setup and Practice

[Back to lab instructions]

Setup

1. Before you start writing code, you will set up a directory for this assignment on the cwolf server. To connect to cwolf, do one of the following:
   • In Windows... Open PuTTY. Fill in cwolf.cs.sonoma.edu as the hostname, and log in using your CS department username and password.
   • In Mac OS X... Open Terminal. Substitute your CS department username for yourusername in the command below:

     ssh yourusername@cwolf.cs.sonoma.edu

     and type your password when prompted.
2. Enter your CS 115 subdirectory by typing

   cd cs115

3. Type pwd (print working directory) and verify that the output is:
   /home/student/yourusername/cs115
4. Create a directory for Lab 2 by typing

   mkdir lab02

5. Enter your Lab 2 directory by typing

   cd lab02

6. Type pwd again, and verify that the output is:
   /home/student/yourusername/cs115/lab02
7. For the next part of this lab, you will create, edit, and test Python programs. You have two choices:
   • [local] You can use IDLE to create and edit your Python programs on your local computer. At the end of the lab, you will use FileZilla to copy your files to the cwolf server, and then you will use PuTTY or Terminal to log in to cwolf and test and submit your code.
   • [remote] You can work directly on the cwolf server by typing text commands into PuTTY or Terminal. You will use emacs to edit your Python programs and python3 to run them.
   This lab will give directions for both options. Directions that only apply to a particular option will be marked with [local] or [remote]. Make your choice now.

Practice

Before you proceed, answer a few questions in your writeup to get more familiar with the Moodle math operators. These questions emphasize the division and remainder operators, which are tricky for many new programmers.

• Question 1 goes over the new vocabulary from lecture.
• Question 2 goes into more depth about division and remainders.
• Question 3 asks you to think about remainders some more.
• Question 4 highlights a useful application of division and/or remainders.

Be sure to ask for help if you need it. In this class, small misunderstandings have a way of coming back to haunt you.

Once you have answered and understood these questions, continue to Part B.