[TUHS] Lorinda Cherry

[markus schnalke]

Hoi.

[2022-02-16 00:54] arnold at skeeve.com
> Dave Horsfall <dave at horsfall.org> wrote:
> > On Wed, 16 Feb 2022, George Michaelson wrote:
> >
> > > I use BC as a daily driver like most people. I never quite got DC, and 
> > > wondered at the duality of them. Very interesting to have the background 
> > > explained.
> >
> > You know you're a greybeard if you can remember why the DC sequence 
> > "99k2vp8opq" was so popular...
> >
> > -- Dave
> 
> I guess I'm not enough of a greybeard:
> 
> $ dc
> 99k2vp8opq
> 1.4142135623730950488016887242096980785696718753769480731766797379907\
> 32478462107038850387534327641572
> 1.3240474631771674622042627661154672512575174353366027242235650231664\
> 2753102603147144252257620301035270505416503
> 
> I recognize the first value as the square root of two. What is
> the second value?

Decoding the program with the manpage:

	99k	set scaling factor to 99 (i.e. 99 digits on output)
	2v	square root of 2
	p	print it (but leave it on the stack)
	8o	switch to octal output
	p	print the same value (now in octal)
	q	quit

More interesting is the question why you need sqrt(2) in octal?


meillo