Re: strange behavior of random numbers with gtkmm

[Oscar Lazzarino <oscar lazzarino i-m3d com>]

On 06/15/2010 10:41 PM, jody wrote:
> My problem is not that i do get the same sequence.
> My problem is that the first time i get a different sequence than the following
> time even though i always use the same seed.
[CUT]
> @oscar: did you make sure *not* to press the reset button before you
> press the 'step' button the first time? So that
> the first call to random() follows the srand() call  triggered in the
> constructor?

Yep. If I press RESET before STEP I get

Reset
Reset   <----- one more RESET
One step: 1889402444
One step: 1202690506
One step: 785052894
Reset
One step: 1889402444
One step: 1202690506
One step: 785052894
Reset
One step: 1889402444
One step: 1202690506
One step: 785052894

But if I press STEP (and never press RESET) I get

Reset
One step: 1889402444
One step: 1202690506
One step: 785052894
Reset
One step: 1889402444
One step: 1202690506
One step: 785052894
Reset
One step: 1889402444
One step: 1202690506
One step: 785052894

In both case the numbers are always the same, as expected.

> BTW: I have gtkmm 2.16.0 and gtk+ 2.16.6

Also tried with gtkmm 2.18.2 and gtk+ 2.18.6