converting float to int issue

[Alex]

Irmen de Jong wrote:

> [OFFTOPIC]
> 
> Alex wrote:
>> Found the problem and resolution:
>> http://forums.gentoo.org/viewtopic.php?t=27211
> 
> Sorry for this second follow up but I just noticed that
> the little C test code they give on that forum is NOT CORRECT.
> 
> It does:
> 
> printf("fractional part = %f\ninteger part = %f\n", modf(x, &y), y);
> 
> 
> And as we all know, the order in which the modf and the y argument are
> evaluated is uncertain. That's why they got 0.0000 for the integer part
> in the result (and sometimes 1.000) . They should have done this:
> 
> double result = modf(x,&y);
> printf("fractional part = %f\ninteger part = %f\n", result, y);
> 
> At first, the code produced the "wrong" results on my system, too.
> After the fix, it produces the correct results.
> 
> Alex, are you on that forum? You might want to point this out over
> there...
> 
> --Irmen de Jong

No I've never had a reason to join.  I guess now would be a good time. 

Alex