EasyManuals Logo
Home>HP>Calculator>HP-11C

HP HP-11C User Manual

HP HP-11C
264 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
To Previous Page IconTo Previous Page
To Previous Page IconTo Previous Page
Page #217 background imageLoading...
Page #217 background image
Section
11:
Programming
Techniques
215
3.
Compute
the
next
approximation
from
the
modified
guess
and
store
it.
4.
Recall
the
value
of
the
previous
approximation
and
subtract
it
from
the
value
of
the
present
approximation.
5.
Recall
the
Ax
limit
and
compare
its
value
with
the
magnitude
of
the
difference
just
computed.
6.
If
the
magnitude
of
the
difference
is
greater
than
that
of
the
Ax
limit
continue
looping.
7.
If
the
magnitude
of
the
difference
is
less
than
that
of
the
Ax
limit,
exit
from
the
loop.
Notice
that
this
method
does
not
guarantee
an
exit
from
the
loop.
The
first
guess
may
have
been
very
far
from
the
actual
root,
or
the
root
may
not
even
exist.
The
best
method
then
is
a
combination
of
the
two,
as
is
the
method
used
by
this
program.
Not
at
all
obvious
is
the
fact
that the
nature
of
certain
functions
is
such
that
phantom
roots
may
appear.
These
phantom
roots
occur
when
the
slope
of
the
function
is
so
large
that
the
difference
between
two
consecutive
approximations
falls
within
the
Ax
limit.
This
program
provides
a
safeguard
against
this
by
testing
not
only
the
loop
count
and
the
Ax
limit
but
also
the
value
of
the
function
at
the
point
in
question.
The
functional
value
is
compared
with
the
tolerance
to
see
how
close
to
zero
the
user
wants
the
solution
to
be.
Flags
When
writing
a
program
that
deals
with
different
problems
in
similar
but not
identical
fashions,
flags
can
be
used
to
control
the
differences
in
the
treatment
of
the
data.
Flags
serve
as
reminders.
For
instance,
when
the
program
performs
an
optional
initial
calculation,
a
flag
may
be
set.
Later
in
the
program
we
may
need
to
know
whether
or
not
the
operation
was
performed,
so
we
test
the
flag,
i.e.,
Is
flag
0
set?
(Was
the
operation
performed?)
In
this
way,
flags
are
part
of
the
decision-
making
power
of
the
calcualtor.
In
the
Curve
Fitting
program,
three
very
similar
processes
may
be
performed
depending
on
the
choice
of
curve
to
be
fit.
To
illustrate
the
role
of
the
flags,
two
more
columns
may
be
added
to
the
chart
on page
162.

Table of Contents

Questions and Answers:

Question and Answer IconNeed help?

Do you have a question about the HP HP-11C and is the answer not in the manual?

HP HP-11C Specifications

General IconGeneral
BrandHP
ModelHP-11C
CategoryCalculator
LanguageEnglish

Related product manuals