[Couenne] Creating Couenne problem directly in C++ code

[Florent Teichteil]

Hi,

Thank you Stephan for your quick reply.

However, I am not sure to understand how the OS interface can actually work
given the fact that the implementation of the CouenneOSInterface class
seems to be very incomplete with many TODO comments and strange things
(like initializing a counter n_var to 0 and then immediately iterating from
0 to it; or also not initializing nor using the OSInstance object...) :

https://projects.coin-or.org/Couenne/browser/trunk/Couenne/src/main/CouenneOSInterface.cpp

Il looks like the OS interface class file was created but not actually
implemented.
Or am I missing something?
Should I use another class to create my MINLP problen directly in C++ code?

Thanks again in advance for your kind help,

Florent
Le 9 juil. 2015 19:00, "Stefan Vigerske" <stefan at math.hu-berlin.de> a
écrit :

> Hi,
>
> as far as I know, the CouenneOSInterface is working.
> Next to AMPL and OS, also the link from GAMS to Couenne is available in
> code:
> https://projects.coin-or.org/GAMSlinks/browser/trunk/GAMSlinks/src/SolverInterfaces/GamsCouenne.cpp
>
> Stefan
>
> On 07/09/2015 06:09 PM, Florent Teichteil wrote:
>
>> Dear Couenne developers,
>>
>> I would like to create a Couenne problem instance directly from C++
>> code by using Couenne as a linkable library. To be clear, I need to
>> create a MINLP problem at execution time depending on the current
>> context of my application, so I don't want to write a nl file and then
>> invoke the Couenne problem in a pipe, read the output and so on. I
>> would like to directly code the problem in C++ and call the solver in
>> C++ code.
>>
>> It seems that there is no documentation to write Couenne problem in
>> direct C++ code. I looked at the AMPL reading classes but the code is
>> not trivial at all.
>>
>> Thus, I looked at the Ooptimization Services interface of Couenne,
>> since it would be much easier to code the problem instance with
>> OSInterface from COIN's Optimization Services project, and then load
>> this instance from Couenne by using CouenneOSInterface.
>>
>> However, the current code of CouenneOSInterface seems to be
>> unfinished, isn't it?
>> What would be the best approach to directly code my Couenne problem in
>> C++ without going through nl files?
>>
>> Thank you very much in advance for your help,
>> Best regards,
>>
>> Florent Teichteil.
>> _______________________________________________
>> Couenne mailing list
>> Couenne at list.coin-or.org
>> http://list.coin-or.org/mailman/listinfo/couenne
>>
>>
>
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