Start Dr. Scheme. At the welcome screen, take the tour if you want, otherwise click Close.
Here, you can see the top window, known as the editor window (or the definitions window), and the bottom window, known as the interactions window. The first line in the interactions window informs you that you're using Dr. Scheme, version 103. The second line tells you what language mode you're currently in: Beginning Student. This mode may be useful for some purposes, but it'll interfere with what you'll need to do, so it'll need to be changed. If you do not change your language mode, you WILL have problems.
Click on the Language menu, then on Choose Language. Click the drop-down box, then choose Full Scheme. In the new dialog box, verify that "Graphical (MrEd)" is selected, and click OK. Back at the main Dr. Scheme window, click Execute. After a moment, the second line in the interactions window will change to "Language: Graphical Full Scheme (MrEd)." If it doesn't change, or looks different, follow the instructions again, making sure to follow them exactly. If you still can't change to full scheme, ask your TA for assistance.
When writing homeworks in Dr. Scheme, write them in the editor window. Do not write them in the interactions window - anything you write there will be lost.
Now, edit the template, inserting your information. Fix gt?XXXx at the top and the bottom of the file, then put your name and GT number after the prompts near the top of the file. When you're finished, you'll have something looking like this. In the upper-lefthand corner is the save button. Click it to save your changes.
;;; ;;; <5>
For instance, if the previous paragraph was the answer to problem #3,
your entry in Dr. Scheme would look like:
;;; <3> ; Your answer will begin on the line following this header. When ; answering a short answer/essay question, every line in the answer must ; start with a semicolon. Aditionally, the lines should be no longer ; than 80 characters long. Near the bottom of Dr. Scheme is a display ; showing your current position in the file in the format ; line:column. Somewhere around column 80, press Enter to move to the ; next line, then start your new line with a semicolon. ;;; <4> (etc)Please note: use only a single semicolon to start your lines.
When answering coding questions, the general format is to use the
problem header (;;;
Click the drop-down box, then click on the
name of the name of the assignment you wish to turn in. Next, click browse. In the box that
appears, navigate to the directory containing your homework. If you've
stored your files in My Documents (as above), then you'll click the directory, then click Open. Now, find your homework file (which you named above, and which probably isn't named "homework
1"), click it, and click Open again. The
file will now appear in the text box near
the bottom of the page. Click Add. The file
will now appear in a box near the center of the
screen. If you have been instructed to turn in multiple files, follow
the same procedure as above to add them. Once you have added all the
files you have been instructed to submit, click the Submit button. The system will ask you for a confirmation. Assuming that the information
displayed is correct, click Yes - Continue. Otherwise, go back and fix
the problem. The system should now tell you that your assignment has
been accepted.
To retrieve your submission, click Retrieve
Submission. Select the assignment you want to retrieve by clicking
on the drop box and clicking the assignment
name, then click Continue. Finally, click Begin Download. Save it to a
location on your disk, perhaps in My Documents. Once it's finished
downloading, open it in a program that handles Zip files, such as Win
Zip. Extract the file(s), open your homework in Dr. Scheme, and
execute it. If it executes, all is well.
;;; <5>
; This function multiplies two numbers together without using the
; multiplication operator. This version only works when the multiplier
; is greater than or equal to zero.
(define (multiply num multiplier)
(if (= 0 multiplier)
0
(+ num (multiply num (- multiplier 1)))))
Please note that good variable names, good indention, good comments,
and plenty of white space are all very important. If any of these elements is
missing, points will be lost.
Testing your Homework
Once you've finished writing your homework, you'll need to test
it. Press the execute button. Your computer will
think for a few seconds. If the text in the bottom window looks like
this, then you don't have any errors major
enough to stop the autograder. If you see anything like this or this, you'll need to
fix it before you turn in your homework. If you don't, you won't
recieve any points for any coding beneath the error. Assuming that
you don't have any major errors in your code, you'll want to test your
individual functions by running them in the interactions window. Run them with different test cases, especially unusual
cases (for instance, the factorial of 0 is 1).
Using WebWork
To turn in your homework, you'll need to use the WebWork system, located at 199.77.128.120:8886. When you follow this
link, you'll get to a logon page (If you recieve a security
error, choose to continue). Type in your Acme username (gteXXXx) and password, and use
cs1321
for the domain. Click Login. You should get to the Message of the Day (MOTD).
From here, click on Submit Assignment.
Checking the submission
At this point, the system should have your submission, ready to be
checked. However, as with any computer software, errors happen. To
make sure that the system really does have your assignment, your next
step will be to retreive it from the system and execute it again.
