On Thu, 26 Nov 2020, Thomas Koenig wrote:
> On my (IEEE) box, this prints
>
> r = 3.402823e+38 d = 1.797693e+308 i = 4
>
> so if you have a working printf (or some other way to display
> floating-point-variables) for C, you can examine the
> values.
This prints:
r = 1.701412e+38 d = 1.701412e+38 i = 4
(unsurprisingly the values are the same as the F-floating and the
D-floating formats only differ by precision). Alternatively say:
printf ("r = %.10e d = %.10e i = %d\n", r, d, i);
prints:
r = 1.7014117332e+38 d = 1.7014118346e+38 i = 4
Finally:
printf ("r = %a d = %a i = %d\n", r, d, i);
prints:
r = 0x<D4>.0ffffp+126 d = 0x<D4>.0ffffffffffffp+126 i = 4
(passed through `less' as otherwise <D4> is rendered as gibberish here and
frankly I don't know what the 0xd4 character encoding is supposed to stand
for as the %a format is supposed to produce hexadecimal digits, possibly
for machine parsing; LANG is unset implying the POSIX C locale across my
systems).
What do you need this information for anyway?
Maciej
