calculate value of 73!

[Tom St Denis]

jacob navia wrote:

[re someone's saying his implementation encroached user namespaces]

Did you overlooked
#include <qfloat.h>
???
Nothing invades the user names space unless he/she wants it so.

Fair enough. However, your program invokes UB in both C and C++ by using
%qf in a printf formatting string, I believe.

Well, duh. His program invokes undefined behavior, or at least
implementation-specified behavior (I don't feel like checking), by
#including <qfloat.h> in the first place.

You don't know that, since you haven't seen qfloat.h (it may be
perfectly compliant). All we know is that UB is introduced by the printf
format string.

First line of qfloat.h

#define printf qfloat_compatible_printf

;-)

Tom

 

[Mark Shelor]

Isn't that just a touch on the churlish side, Pete (albeit correct!)?

For the record, I thought Mark's reply was superb.

A very kind remark, Richard. Thank you. I've also added a splendid
adjective to my vocabulary

Truthfully, though, I was ignorant of EXIT_SUCCESS and EXIT_FAILURE, so
thanks also to Pete for pointing this out.

Regards, Mark

 

[Richard Bos]

You don't know that, since you haven't seen qfloat.h (it may be
perfectly compliant).

Imprimis, he didn't show us his qfloat.h, so the program _as posted_
invokes non-defined, IIRC undefined, behaviour.
Secundis, you can't definedly use <> with your own headers; only the
Standard headers are guaranteed to be useable that way. "qfloat.h" is
also not quite guaranteed to be found, but there are more requirements
for the search in that case.

Richard