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Re: fprintf with /r/n outputs only one line

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On 29/08/2015 23:59, Malcolm McLean wrote:
> On Saturday, August 29, 2015 at 10:47:16 PM UTC+1, Bart wrote:

>> I'm sure he didn't mean ordinary expressions, but that procedure calls
>> (not really function calls) should be written as separate statements.

> Yes, I qualified with "generally" and gave a couple of exceptions.
> However basic mathematical functions embedded in expressions could
> reasonably be added to the list.
>
> One issue with structured programming is that there is small list
> of basic mathematical functions that most programs need, and which
> aren't directly supported by the processor. Those tend to be used
> as the paradigm for a "function". Actually these functions are
> rather untypical. They don't need documenting. If we see in language
> X
>
> x := [math->cos]->[theta]
>
> we know what that's going to do, even if we've never seen an example
> of X before.

(In my own languages, mathematical functions are considered operators. 
So you can't use that argument!)

> But user functions aren't like that. It's often not entirely obvious
> what they do from the name, and frequently the reader has to check.
> There's usually no convention for the arguments, which are often
> structures, and often quite numerous. Often they manipulate an
> object rather than returning one, often they return several values,
> often they do both. Also, often the arguments have state which is
> defined in terms of previous calls to related functions - evaluation
> order matters.
>
> So it's a mistake to use the mathematical functions as mental templates
> for function design.

I disagree here. There are user 'functions' which are intended to be 
called as procedures or subroutines. And there are user functions 
designed to be used inside an expression, and there's usually little 
problem.

But in C especially, people prefer that even procedures return some sort 
of value, perhaps a status. With the consequence that some try to cram 
several such calls into a single expression.

-- 
Bartc

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fprintf with /r/n outputs only one line Dale <dale@dalekelly.org> - 2015-08-28 23:08 -0400
  Re: fprintf with /r/n outputs only one line Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2015-08-28 21:25 -0600
    Re: fprintf with /r/n outputs only one line Dale <dale@dalekelly.org> - 2015-08-28 23:56 -0400
  Re: fprintf with /r/n outputs only one line James Kuyper <jameskuyper@verizon.net> - 2015-08-28 23:34 -0400
    Re: fprintf with /r/n outputs only one line Dale <dale@dalekelly.org> - 2015-08-29 00:02 -0400
      Re: fprintf with /r/n outputs only one line Johann Klammer <klammerj@NOSPAM.a1.net> - 2015-08-29 06:51 +0200
        Re: fprintf with /r/n outputs only one line Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-08-29 07:30 +0000
        Re: fprintf with /r/n outputs only one line Keith Thompson <kst-u@mib.org> - 2015-08-29 01:23 -0700
      Re: fprintf with /r/n outputs only one line James Kuyper <jameskuyper@verizon.net> - 2015-08-29 11:22 -0400
        Re: fprintf with /r/n outputs only one line glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-08-29 16:59 +0000
      Re: fprintf with /r/n outputs only one line Geoff <geoff@invalid.invalid> - 2015-08-30 11:40 -0700
        Re: fprintf with /r/n outputs only one line Keith Thompson <kst-u@mib.org> - 2015-08-30 15:17 -0700
          Re: fprintf with /r/n outputs only one line Geoff <geoff@invalid.invalid> - 2015-08-30 16:21 -0700
            Re: fprintf with /r/n outputs only one line James Kuyper <jameskuyper@verizon.net> - 2015-08-30 19:45 -0400
  Re: fprintf with /r/n outputs only one line Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-29 14:51 +0100
    Re: fprintf with /r/n outputs only one line Ayan <selfjam@gmail.com> - 2015-08-29 10:24 -0400
      Re: fprintf with /r/n outputs only one line James Kuyper <jameskuyper@verizon.net> - 2015-08-29 11:27 -0400
      Re: fprintf with /r/n outputs only one line Ayan <selfjam@gmail.com> - 2015-08-29 14:31 -0400
      Re: fprintf with /r/n outputs only one line Keith Thompson <kst-u@mib.org> - 2015-08-29 13:31 -0700
    Re: fprintf with /r/n outputs only one line Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-29 16:03 +0100
      Re: fprintf with /r/n outputs only one line Ike Naar <ike@iceland.freeshell.org> - 2015-08-29 16:50 +0000
        Re: fprintf with /r/n outputs only one line Ike Naar <ike@iceland.freeshell.org> - 2015-08-29 17:05 +0000
          Re: fprintf with /r/n outputs only one line Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-29 19:39 +0100
            Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-29 14:05 -0700
              Re: fprintf with /r/n outputs only one line Bartc <bc@freeuk.com> - 2015-08-29 22:46 +0100
                Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-29 15:59 -0700
                Re: fprintf with /r/n outputs only one line Bartc <bc@freeuk.com> - 2015-08-30 00:31 +0100
                Re: fprintf with /r/n outputs only one line Bartc <bc@freeuk.com> - 2015-08-30 10:25 +0100
                Re: fprintf with /r/n outputs only one line Bartc <bc@freeuk.com> - 2015-08-30 13:22 +0100
                Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-31 03:18 -0700
                Re: fprintf with /r/n outputs only one line Bartc <bc@freeuk.com> - 2015-08-31 11:58 +0100
                Re: fprintf with /r/n outputs only one line Bartc <bc@freeuk.com> - 2015-08-31 13:38 +0100
                Re: fprintf with /r/n outputs only one line glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-09-04 04:18 +0000
                Re: fprintf with /r/n outputs only one line "Charles Richmond" <numerist@aquaporin4.com> - 2015-09-04 05:09 -0500
                Re: fprintf with /r/n outputs only one line Robert Wessel <robertwessel2@yahoo.com> - 2015-09-04 05:19 -0500
                Re: fprintf with /r/n outputs only one line raltbos@xs4all.nl (Richard Bos) - 2015-09-04 16:33 +0000
              Re: fprintf with /r/n outputs only one line Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-30 02:17 +0100
                Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-29 23:43 -0700
                Re: fprintf with /r/n outputs only one line Geoff <geoff@invalid.invalid> - 2015-08-30 11:47 -0700
                Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-30 13:18 -0700
                Re: fprintf with /r/n outputs only one line Geoff <geoff@invalid.invalid> - 2015-08-30 16:04 -0700
              Re: fprintf with /r/n outputs only one line Ike Naar <ike@iceland.freeshell.org> - 2015-08-30 07:20 +0000
              Re: fprintf with /r/n outputs only one line Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-06 15:17 -0700
                Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-09-06 16:36 -0700
                Re: fprintf with /r/n outputs only one line Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-07 23:19 -0700
                Re: fprintf with /r/n outputs only one line Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-09-08 02:50 -0700
            Re: fprintf with /r/n outputs only one line Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-30 02:14 +0100

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