Overview

• Preliminaries.
  • Admin.
  • Upcoming Work.
  • Extra Credit.
  • Questions.
• Lab.

Preliminaries

Admin

• Continue partners!
• Sorry that I can't be there. I continue to have confidence that our Mentors will do an awesome job.

Reminders

• Office hours this week
  • See http://rebelsky.youcanbook.me.
  • Ask me about other available times.
• Tutor hours
  • Sunday, 3-5 p.m.
  • Sunday-Thursday, 7-10 p.m.
• Weekly review sessions:
  • Wednesday at 8pm in the CS Commons with
  • Thursday 10 am review session with Sam.
  • Thursday at 8pm in the CS Commons with

Upcoming Work:

• Reading for Tuesday
  • Numeric Recursion
• Exam 2 due TONIGHT
  • Epilogue for exam 2 due TONIGHT
  • Cover sheet for exam 2 due TOMORROW
• Lab Writeup: Exercise 3abc
  • Send email titled CSC 151 Lab Writeup 30 (Your Names)
  • Do not include the underscores.
  • Send to CSC151-02-grader@grinnell.edu
  • Due before class on Friday.

Extra Credit

• Send your reports to rebelsky@grinnell.edu with subject "CSC 151 Extra Credit". (Do not include the quotation marks.)
• Send opportunities to me before class with subject "CSC 151 EXTRA CREDIT OPPORTUNITY!"

Academic / Artistic

• Cool talk on Cryptography Wednesday at 4:15 (Math/CS)

Peer

Regular Peer (weekend things probably won't be this weekend)

• Social Dance Workshop Tuesdays 7:00-8:00 in Bucksbaum Dance Studio
• Pun club Saturdays at 4pm in Younker
• Electronic Potpourri on KDIC Fridays at Five
• Space Odyssey KDIC Fridays at Six
• Bollywood, Friday, 7:30-8:30, Younker
• Effective Altruism club, 2:30-3:30 Sundays in JRC 226.

Misc

Far in the Future

• Lords of the Flies, April.

Questions

Can I use recursion on exam 2?

No. You had not learned recursion by the original due date.

Any hints on problem 4?

Sure. You want to conduct a series of tests that will make you confident that the alternate-scale procedure is correct. That means you should consider drawings with (a) different shapes; (b) different positions; (c) different sizes; and (d) different scales. For each variation, you can use the helper procedure provided in the reading.

How many tests should I write?

I expect about a dozen calls to the provided procedure.

Any hints on the drella! procedure?

The p-and-s! procedure from the lab on collage should be helpful. Note, however, that you need to copy the image before you call p-and-s!.

Because you will have to paste more than once, think about the forms of repetition you know (other than recursion).

Remember that you are dealing with imags and GIMP tools. Do not use the drawing operations for this problem!

Lab