Handout: How to prepare your own practice exam
----------------------------------------------

April 25, 1991
-----------------------------

In file $OO/exams/practice-exam-handout

Many of the objectives we cover in this course, can also be performed
by the Demeter tools.  The objectives which can be handled
by the tools include:

Class dictionary graph recognition
Class dictionary graph textual representation
Class dictionary graph graphical representation
Printing
First sets
Parsing
Follow sets
LL(1) checking
etc.

The Demeter tools not only give you an efficient environment to
do your homework faster (imagine if you had to write all the parsers,
printers, class definitions etc.), but also give you a nice environment to 
learn fundamental techniques of Computer Science.

Here is how you can prepare your own exam:

Write a class dictionary D and put it into file cd. Run

sem-check -i cd

Modify the cd, if there are error messages until the cd is accepted.
(You will learn: Legal class dictionary graph and the LL(1) rules
in this process)

Then inspect the following files for the objectives you want to learn:

cd-com-exp

	Class dictionary graph flattening

cd-ffsets

	First sets, Follow sets

cd-ll1-corrected

	LL(1) correction

cd-param-exp
	
	Parameterization expansion 

To master the Parsing objective, cretae a class library with
the Demeter commands.
Write a few inputs for your cd and
use run to test them. This will also teach you the Scanning objective.

To master the Printing objective, call g_print() for any object.

To master the Object construction objective, write a C++
statement sequence
to build the object and then use g_draw() or g_print() to print it
out. Did you get the right object? Alternatively, you can use
g_code.

To master the C++ translation objective, use the tools to
generate a class library
and inspect the C++ code provided.

To master the Propagation pattern in C++ objective, write a
propagation in file x.pp, call make and inspect the generated
C++ code in x-DEM.c.  You may also want to inspect the 
propagation graph files.

To master the Growth plan objective, write a growth plan
and check it with gp-check.

To master the Class dictionary graph graphical representation objective,
use the xcddraw program to draw a class dictionary graph.
This will teach you interactively most of the
Legal class dictionary graph objective.