Programming Exercise (HP-15C, 15C LE - and others)

[Gerson W. Barbosa]

(03-22-2014 05:12 AM)Thomas Klemm Wrote:  

(03-22-2014 03:02 AM)Gerson W. Barbosa Wrote:  I guess the limit hasn't been reached yet -- the WP 34S has a rich instruction set

What about:

Code:

LBL 00
(-1)ˣ
RCL/ L
END

10000.001
\(\sum\) 00

Hello Thomas,

Only some observations:
- this is item (a) of the original exercise;
- a manual +/- is required;
- it takes too long: 4 min 6 sec.

Because of its conciseness that's what I had been using for testing purposes until your reply to Shawn's post (I remember you suggested me a similar sequence for evaluating a summation, early this year).

It returns 0.6930971830599453, however, same as before. (I think that's because the extra 18 guarding digits in single precision mode).

Item (b) would be something like

Code:


LBL A
+/-
RCL+ 00
(-1)ˣ
RCL/ L
END

10001 STO 00
10.001
\(\sum\) 00
+/-

will return 0.6930971830599452 in single precision mode after 4 min 11 sec.

A greater difference between both results should be expected in double precision mode, thus demonstrating Dr. Wirth's point in his exercise.

Cheers,

Gerson.