Turbo Prolog

10 Tutorial VIII:
Spreading Your Wings
In this final section of the tutorial, we present some example programs intended to
stimulate your own ideas and to provide further illustration of the topics covered in the
earlier tutorial chapters. Nearly all of the examples offer plenty of room for expansion;
your own ideas can grow into full-blown programs using one of our programs as
a basis. For complete information about the Turbo Prolog system, see Chapters II
and 12.
BUILDING A SMALL EXPERT SYSTEM
We shall use Turbo Prolog to construct a small expert system that will figure out which
of seven animals (if any) the user has in mind. It will do so by asking questions and then
making deductions from the replies given. A typical user dialogue with our expert
system might be:
Goal :_run.
has it hair?
yes
does it eat meat ?
yes
has it a fawn color ?
yes
has it dark spots ?
yes
Your animal may be a (an) cheetah !
Turbo Prolog's ability to check facts and rules will provide our program with the reasoning
capabilities germane to an expert system. Our first step is to provide the knowledge
with which to reason, shown in Program 51.
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