[Cbc] Increase number of digits in solution file

Wed Oct 4 04:19:09 EDT 2017

Nicolas,

Give up and do it the incorrect way.  Don't try and define 
CLP_OUTPUT_FORMAT.

Go to line 58 (about) in CbcSolver.cpp and change the line

#define CLP_OUTPUT_FORMAT %15.8g

to whatever you want.

John Forrest

On 03/10/17 14:01, nicolas.derhy at engie.com wrote:
>
> Hi,
>
> I followed your advice and I tried to add  #define CLP_OUTPUT_FORMAT 
>  "%20.12g" in Clp/src/config_default.h but it has no effect.
>
> Then I tried to change compile parameters but did not know exactly 
> what to do : I modified preprocessor definitions by adding 
> CLP_OUTPUT_FORMAT=%20.12g; but no effect.
>
> I tried with quote (CLP_OUTPUT_FORMAT=”%20.12g”;), I tried on 
> different vs projects (cbc, libCbc and libClp) but it was unsuccessful…
>
> When I watch the resulting command line, it seems that percent symbol 
> is not well recognized because I obtain : /D "CLP_OUTPUT_FORMAT=\" .12g\""
>
> If anyone can give me more details, it would be great !
>
> Nicolas
>
> *De :*Fausto Richetti Blanco [mailto:fausto.blanco at gmail.com]
> *Envoyé :* jeudi 21 septembre 2017 18:59
> *À :* John Forrest <john.forrest at fastercoin.com>
> *Cc :* Derhy Nicolas (ENGIE SA) <nicolas.derhy at engie.com>; cbc 
> <cbc at list.coin-or.org>
> *Objet :* Re: [Cbc] Increase number of digits in solution file
>
> I think you can add -DCLP_OUTPUT_FORMAT ="%20.12g" to the compiler 
> parameters in the project settings of visual studio
>
> On Thu, Sep 21, 2017 at 1:05 PM, John Forrest 
> <john.forrest at fastercoin.com <mailto:john.forrest at fastercoin.com>> wrote:
>
>     Nicolas,
>
>     I only use Linux, so maybe someone else can help.
>
>     I think that for Visual Studio you have to modify
>     Clp/src/config_default.h by hand.  If so then I would try adding 
>     #define CLP_OUTPUT_FORMAT ="%20.12g".  I am not sure if you need
>     the "".  I hope someone will correct me if I am wrong.
>
>     John Forrest
>
>     On 21/09/17 14:24, nicolas.derhy at engie.com
>     <mailto:nicolas.derhy at engie.com> wrote:
>
>         Hi John,
>
>         Can you explain me how to do this ?
>
>         I have downloaded source code and I compiled it successfully
>         (using Visual Studio 2010).
>
>         I found some CXXDEFS in the configure file but I do not know
>         what to modify.
>
>         Nicolas
>
>         *De :* Cbc [mailto:cbc-bounces at coin-or.org] *De la part de*
>         John Forrest
>         *Envoyé :* mardi 19 septembre 2017 18:57
>         *À :* cbc at list.coin-or.org <mailto:cbc at list.coin-or.org>
>         *Objet :* Re: [Cbc] Increase number of digits in solution file
>
>         Nicolas,
>
>         When you configure cbc add to CXXDEFS
>
>         -DCLP_OUTPUT_FORMAT ="%20.12g"
>
>         or whatever you want.
>
>         John Forrest
>
>         On 19/09/17 16:02, nicolas.derhy at engie.com
>         <mailto:nicolas.derhy at engie.com> wrote:
>
>             Hi everybody,
>
>             I often use cbc exe. It works very well and each time I
>             use it, I add to the command line “-solution
>             mySolution.txt” in order to recuperate the optimal solution.
>
>             My problem is that the values stored in the solution file
>             lacked sometimes of precision when I need a lot of digits.
>
>             For example, I recently obtained 1.5596969e+008 whereas I
>             was hoping for  155969687.
>
>             I tried several options like –output but I did not find
>             any option that will fit my expectations.
>
>             Is there a way to increase the number of digits in
>             solution file ?
>
>             Nicolas
>
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