Algorithms and OOD (CSC 207 2014F) : EBoards

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CSC207.01 2014F, Class 15: Inheritance

Overview

Preliminaries.
- Admin.
- Upcoming Work.
- Extra Credit.
- Questions (admin and homework).
Questions: Polymorphism and Interfaces.
Questions: Inheritance.
Lab: Polymorphism (finish)
Lab: Inheritance (start)

Preliminaries

Admin

New lab partners!
- Finish the polymorphism lab with your new partner.
- Start the inheritance lab with your new partner, too.
- Continue the inheritance lab tomorrow.
Reminder: You can get extra credit by providing useful links.
I will not be here tomorrow. Mira and Prof. Walker will support you.

Upcoming Work

Daily lab writeup: http://bit.ly/207writeup
Peer Reviews on HW4: http://bit.ly/207-2014F-peer04
HW 5 due Wed night.
HW 6 assigned. Due next Tuesday.
- We'll go over it quickly.
Readings for Wednesday:
- Review Inheritance
- Documentation and Javadoc

Extra Credit Opportunities

Academic

Convocation Wednesday: Tara Zahra on Emigration from Eastern Europe
- Tweet using #GCConvo
CS extras Thursday: EF, AHD, ZW and more on MIST.
CS table Friday: ?.
Town hall meeting, 7:30 p.m. next Tuesday

Peer Support

CS extras.

Miscellaneous

Participate in #GrinWell http://www.grinnell.edu/forms/sign-grinwell-presidents-wellness-challenge
Friends of Drake Library needs help setting up for their annual booksale on Thursday, October 2 (conveniently, the same night as Grinnell High School's homecoming parade). You can help a good cause and probably get a few free books, too.
- Followup: They can also use help on Wednesday, October 1.

Admin Questions

How do I get the CSC207.xml file onto my Mac or Linux Workstation?

Open a terminal window.

Type sftp USERNAME@ssh.cs.grinnell.edu

Type get /home/rebelsky/share/CSC207.xml

Homework Questions

Where can the register appear in an assignment?

The register being assigned to must appear as the first thing in the string.

So if I see an equals sign anywhere but immediately after that first register, I should ..."

Issue an error.

I'm getting infinite computation or other errors when working with BigDecimal values

Use the divide method that lets you specify a precision. (Think carefully about what that precision should be.)

Determine when you are done by comparing a to n/a.

Should we take negative numbers in our calculator?

Yes.

Polymorphism Questions

Inheritance Questions

Labs

Start the inheritance lab at 11:35.