CS W1007x Introduction to Computer Science - Spring 1998
Homework #1 (5 points)
Draw Your TA
Start from the code shown in class:
9:00pm Wednesday, February 11 (section 2); 9:00pm Thursday, February 12
Chapter 3 and also Section 7.2 ("The Art and Science of C" by Roberts)
In this assignment, you get to draw your TA! (If
you don't feel like drawing your TA (or, heaven forbid, have not met
her or him), you can draw the instructor.) It's going to be a
crude picture using lines, arcs, and circles, but we will consider it
to be a success if it vaguely resembles a person. It will be a
great success if we can actually figure out which TA it is or
if the picture conveys something of his or her personality! Be
This week we are
covering variables, some simple conditionals, loops, and a variety of
graphics functions in class, so
have all the tools needed to complete this
The requirements for this program is:
- At least twenty (20) lines, arcs, or circles as part of the drawing. (Include
a few of each to demonstrate that you know how to use them.)
- At least one loop to draw a repeated part of the scene. For
example, use a for loop to draw some grass at the TA's feet.
Or, give Robert a goatee.
(This is also a great way to get a whole bunch of items drawn to
work up to the required twenty!)
- There have to be at least two possible scenes that can be
displayed. For example, there can be a happy TA and a sad TA. The
difference between the two does not have to be much, e.g., a frown
versus a smile.
- A user-friendly query allowing the user to input which scene they
would like to have displayed.
- Organize and group your drawing instructions into logical units.
For example, group the commands according to which part of the body
they are used to draw. Provide a comment for each of these groups of
If you run into any complex mathematical formulas for calculating the
placement of objects, you have gone beyond the scope of this
assignment. This is OK, however, so feel free to ask for help
from the TAs or the instructor.
For this and each remaining homework (every other week) there will
be a recitation section offered by the TAs. You are strongly
encouraged to attend! This will help you solidy concepts,
learn more technical Unix, EMACS and C overhead, and ask more
questions. You should go to the course web page to see the
schedule for the current recitation "batch".
Submitting your work:
The following information will be made available on the the course web
page: How to submit it on-line, and who to submit it to. Before then,
do not submit in any way. Submission will be electronic but not
through email. You will also be required to hand in a hardcopy.
If you run into any difficulties at all, please come and
see us. We will be more than happy to help!
You can always see the current office hours on the
course home page, http://www.cs.columbia.edu/~evs/intro/overview.html
- The program compiles and executes successfully (1 point).
- The program contains all of the required programming elements
listed in the program specification (1.5 point).
- The program is well organized (1.5 point).
- The program is well commented and formatted (1 point).
email: evs at cs dot columbia dot edu
(Thanks to Andrew Kosoresow and Ivan J. Leichtling for helping develop this handout.)