CS 115 Lab 6, Spring 2015

Deadlines

• Pre-lab: Tu 2/24/2015 at 7 AM
• Writeup and code (lab06c.py): Tu 3/3/2015 at 4 PM
• Demo (parts A and C): Any lab section, workshop, or open tutoring session before Tu 3/3 at 4 PM. Your last chance is the Tuesday tutoring from 3-4 PM.

Goals

Upon successful completion of this lab, you should be able to understand and write programs using while (indefinite) loops.

Pre-Lab Assignment

Click here for the pre-lab instructions.

Even if you didn't get to the pre-lab by the deadline, you should work through it before proceeding with the rest of the lab. A PDF of the pre-lab is available on Moodle.

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 6 by typing

   mkdir lab06

5. Enter your Lab 6 directory by typing

   cd lab06

6. Type pwd again, and verify that the output is:
   /home/student/yourusername/cs115/lab06
7. Decide whether you want to work directly on cwolf ([remote]) or work on IDLE at your local computer ([local]), and follow the relevant instructions for the rest of the lab.

Lab Instructions

Follow the links below to complete each part of this lab.

1. Basic while loops: the Collatz sequence
2. Find the largest power of 2 less than a number
3. Write a number as the sum of powers of 2
4. Submit your assignment