COMP 210: Principles of Computing and Programming

Homework Assignments

General Rules

Homework should be done in pairs: Work the problems. Cross check your work. Hand in one copy of the solution.

All homework is due at the start of class on (usually) Mondays.

Homework will be handed in electronically so BE SURE THAT BOTH TEAM MEMBERS' NAMES ARE TYPED AT THE TOP OF YOUR WORK!!

General Dropoff Site (from on-campus only!): ftp://comp210@www.exciton.cs.rice.edu/comp210/dropoff

File Naming Rules

Name your files with the concatenation of the team members' login names with a dash in between, plus "-HXX.scm" at the end where XX is the two-digit homework number.

Example: Mickey Mouse ("mmouse") works with Donald Duck ("dond") work together on homework #6: mmouse-dond-H06.scm

If a homework requires more than one file, "zip" all the files together using gzip or winzip and use the above naming convention, except that the extension would be ".zip" instead of ".scm". Example: mmouse-dond-H11.zip

Failure to use the above naming convention may result in lost files and lost points!

Be sure that the team members' names are INSIDE the files!

If you need to upload a another copy of your homework, add "A", "B", etc to the end of the filename: e.g. mmouse-dond-H11A.zip and then e-mail us (comp210@rice.edu) so we know which file to grade.

Dropoff Instructions

Dropoff is an FTP (File Transfer Protocol) upload and must be done from on-campus or, equivalently, via a VPN (Virtual Private Networking) connection from off-campus.
Netscape (later than v. 4) cannot do an FTP upload! Internet Explorer can however. Check if your version of Netscape has a File/Upload menu option (missing in later versions).
For advance instructions on using IE for FTPing, see below.
Instructions for using the command-line FTP from Unix:
- Start in the directory which contains your code. Be sure your file is correctly named!
- Type ftp and then Enter/Return. This should produce the ftp prompt ftp>.
- Type open www.exciton.cs.rice.edu
- You will be prompted for a username (comp210) and a password (given in class).
- Change to the dropoff directory by typing cd comp210/dropoff
- Change to the appropriate homework directory by typing cd hwXX where XX is the two-digit homework number, e.g. hw02.
- Change to the appropriate lab directory, cd Wed1430 or cd Wed1900 -- if the partners are in different labs, ask your labbies which one to hand into.
- Upload the homework file by typing put filename where filename is the name of your file.
- Disconnect from the server by typing disconnect
- Quit the FTP program by typing quit
If your FTP program supports it, all files must be transferred in binary mode.

Homework Assignments

Returned Homework

Homeworks are returned in lab. If you don't get them there, a day or two later they'll show up in Duncan 3142, on a shelf. They'll only be kept for 1-2 weeks before being tossed. If you have questions about a particular hw, contact the labbies in your section.
In marking your papers, your labbies might use some standard proofreader marks.

FTPing with Internet Explorer

IE should be at least version 6.
A "Page Not Found" error is often returned when one first browses to the FTP site. Just hit "Refresh" to get the login prompt.
If you have been using IE to FTP to multiple sites with multiple logins, there may be some problems:
- IE remembers all the logins and passwords that you have used.
- IE tries to use the last login and password that you used -- which may not be the correct one.
- IE may not tell you that it is doing this and you will experience login problems but no login prompt appears.
  - Solution: When IE is pointed at the correct FTP URL, go to File/Login As.... This will bring up the login prompt.

Questions about this site should be posted to the class newsgroup.