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Re: what is data type 'int *' ?

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James Kuyper <jameskuyper@verizon.net> wrote:

(snip, I wrote)
>> If (int) and (int*) are the same size, and passed to functions
>> the same way, it usually works.  As machines with pointer and int
>> of different size became more popular, there was more need for
>> the message.
 
>> Note that you can cast to (int) and print with %i or %x. The 
>> conversion is system dependent, but sometimes people know what
>> it does on the specific system, and find it useful. 
 
> It's not merely system dependent: "If the result cannot be represented
> in the integer type, the behavior is undefined. The result need not be
> in the range of values of any integer type." (6.3.2.3p6)

If one doesn't understand the underlying hardware, the way it
stores addresses, and such, yes, one should not use it.

But if one does, there might be some cases where it is better.
For one, you have the choice of %x for hex, or %i for decimal.
With %p you get what someone else decided was best. As well as
I know it, that could be hex, decimal, or some combination.

> Don't do that. The right way to print pointer values is 
> with "%p" and a cast to void*.

-- glen

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what is data type 'int  *' ? bilsch <king621@comcast.net> - 2015-02-04 23:45 +0000
  Re: what is data type 'int  *' ? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-05 00:09 +0000
    Re: what is data type 'int  *' ? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-02-05 01:24 +0000
      Re: what is data type 'int  *' ? James Kuyper <jameskuyper@verizon.net> - 2015-02-05 07:00 -0500
        Re: what is data type 'int  *' ? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-02-05 14:09 +0000
          Re: what is data type 'int  *' ? Robert Wessel <robertwessel2@yahoo.com> - 2015-02-05 13:08 -0600
            Re: what is data type 'int  *' ? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-02-06 00:33 +0000
              Re: what is data type 'int  *' ? Robert Wessel <robertwessel2@yahoo.com> - 2015-02-05 19:30 -0600
                Re: what is data type 'int  *' ? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-02-06 10:17 +0000
                Re: what is data type 'int  *' ? Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-02-07 13:21 -0800
  Re: what is data type 'int  *' ? Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-02-04 19:47 -0500
    Re: what is data type 'int  *' ? bilsch <king621@comcast.net> - 2015-02-05 09:40 +0000
      Re: what is data type 'int  *' ? Richard Heathfield <rjh@cpax.org.uk> - 2015-02-05 09:51 +0000
    Re: what is data type 'int  *' ? Keith Thompson <kst-u@mib.org> - 2015-02-05 08:04 -0800
      Re: what is data type 'int  *' ? glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-02-06 00:42 +0000
        Re: what is data type 'int  *' ? Keith Thompson <kst-u@mib.org> - 2015-02-05 19:09 -0800
  Re: what is data type 'int  *' ? Kaz Kylheku <kaz@kylheku.com> - 2015-02-05 01:17 +0000
  Re: what is data type 'int  *' ? Richard Heathfield <rjh@cpax.org.uk> - 2015-02-05 03:04 +0000
    Re: what is data type 'int  *' ? Richard Heathfield <rjh@cpax.org.uk> - 2015-02-05 03:06 +0000
  Re: what is data type 'int  *' ? Richard Heathfield <rjh@cpax.org.uk> - 2015-02-05 03:06 +0000
    Re: what is data type 'int  *' ? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-05 10:20 +0000
      Re: what is data type 'int  *' ? Richard Heathfield <rjh@cpax.org.uk> - 2015-02-05 10:47 +0000
        Re: what is data type 'int  *' ? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-05 12:18 +0000
          Re: what is data type 'int  *' ? Richard Heathfield <rjh@cpax.org.uk> - 2015-02-05 12:40 +0000
      Re: what is data type 'int  *' ? Keith Thompson <kst-u@mib.org> - 2015-02-05 08:24 -0800
        Re: what is data type 'int  *' ? James Kuyper <jameskuyper@verizon.net> - 2015-02-05 11:42 -0500
        Re: what is data type 'int  *' ? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-05 17:13 +0000
    Re: what is data type 'int  *' ? Keith Thompson <kst-u@mib.org> - 2015-02-05 08:43 -0800
  Re: what is data type 'int  *' ? bilsch <king621@comcast.net> - 2015-02-05 09:45 +0000
  THANKS FOR THE INFO bilsch <king621@comcast.net> - 2015-02-05 09:47 +0000

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