23 Jan
2023
23 Jan
'23
2:43 p.m.
On Sun, Jan 22, 2023 at 10:11 PM Larry McVoy <lm(a)mcvoy.com> wrote:
On Mon, Jan 23, 2023 at 02:07:14PM +1100, Dave
Horsfall wrote:
The other way around. `bc` is a little interpreter that accepts infix
notation and has a fairly complete language built into it that
generates `dc` and delegates to that to do the actual mathematics.
On Sun, 22 Jan 2023, Steve Nickolas wrote:
I know this is about dc (which I think is under bc or is it the other way
around?) I think there was one particular dc clone...guy
whose name started with
a G? and his version did that.
On my ancient MacBook Pro (13-inch, mid 2010, High Sierra 10.13.6):
mackie:~ dave$ dc
(^D)
mackie:~ dave$ dc -V
dc (GNU bc 1.06) 1.3
On my ancient FreeBSD server:
aneurin% dc
(^D)
aneurin% dc -V
dc (BSD bc) 1.3-FreeBSD
Nil prompt in both cases.
> Most Linux versions use GNU's which Does The Right Thing???????. but to pick on GNU:
slovax ~ 'bc'
bc 1.06.95
Copyright 1991-1994, 1997, 1998, 2000, 2004, 2006 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
slovax ~ alias bc
alias bc='bc -ql'
because, well, the same reason I run vi in terse mode.
Agreed. The copyright banner every time I run `bc` is excruciating.
The `-l` argument came up not too long ago elsewhere; someone asked
why `bc -l` is not the default. For those that don't know, `bc -l`
loads a library of math functions (sine/cosine, arctan, and a couple
of transcendentals) and sets the scale to 20 decimal points. It's very
useful, but I suspect the reason this wasn't the default is that
loading that library cost RAM and real cycles on a PDP-11 and for most
simple uses that wasn't necessary.
- Dan C.