<div dir="ltr">The code is the following --very simple.<br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">
<div>I use VS2010. The same result under Ubuntu.</div></div></blockquote><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>regards,</div>
<div>Shahin</div><div><div><br></div><div><br></div><div>/**@file triKnapsack.c</div>
<div> * @brief The first example for solving a three-constraint knapsack problem</div><div> * @author Shahin Gelareh</div><div> *</div><div> * This example shows how to setup and solve the model using SCIP as callable library.</div>
<div> *</div><div><br></div><div>/*--+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/</div><div><br></div><div>#include <stdio.h></div><div><br>
</div>
<div>//#include "scip/scip.h"</div><div>//#include "scip/scipdefplugins.h"</div><div>/* include SCIP components */</div><div>#include "objscip/objscip.h"</div><div>#include "objscip/objscipdefplugins.h"</div>
<div><br></div><div>#include <iostream></div><div>#include <sstream></div><div>#include <string></div><div>#include <vector></div><div>using namespace scip;</div><div>using namespace std;</div><div>
<br></div><div>string itos(int arg) //converts an integer to a std::string</div><div>{</div><div> ostringstream buffer;</div><div> buffer << arg;</div><div> return buffer.str();</div><div>}</div><div><br></div>
<div><br></div><div>/** main method starting SCIP */</div><div>int main(</div><div> int argc, /**< number of arguments from the shell */</div><div> char** argv /**< array of shell arguments */</div>
<div> ) /*lint --e{715}*/</div><div>{</div><div> SCIP_RETCODE retcode;</div><div> SCIP* scip;<span style="white-space:pre-wrap"> </span>// create the null pointer to SCIP</div><div> SCIP_CALL(SCIPcreate(&scip));<span style="white-space:pre-wrap"> </span>// initialize the SCIP instance</div>
<div><br></div><div> SCIP_CALL(SCIPincludeDefaultPlugins(scip));<span style="white-space:pre-wrap"> </span>// load the default plugins</div><div> // create an empty problem</div><div> SCIP_CALL(SCIPcreateProb(scip, "triKnapsack", NULL, NULL, NULL,</div>
<div><span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> NULL, NULL, NULL, NULL</div>
<div> ));</div><div> SCIP_CALL(SCIPsetObjsense(scip, SCIP_OBJSENSE_MAXIMIZE));</div><div><br></div><div> std::vector<SCIP_VAR*> var(3);</div><div> for(int i = 0; i < 3; i++)</div><div> {</div><div><span style="white-space:pre-wrap"> </span> string name = "x[" + itos(i) + "]";</div>
<div><span style="white-space:pre-wrap"> </span> SCIP_CALL(SCIPcreateVar(scip, &var[i], (const char*)name.c_str(), </div><div><span style="white-space:pre-wrap"> </span>0.0, 1.0, i+1, SCIP_VARTYPE_BINARY,</div>
<div><span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span>TRUE, FALSE, NULL, </div>
<div><span style="white-space:pre-wrap"> </span>NULL, NULL, NULL, NULL));</div><div><span style="white-space:pre-wrap"> </span> SCIP_CALL(SCIPaddVar(scip, var[i]));</div><div> }</div><div> std::vector<SCIP_CONS*> cons(3);</div>
<div> for(int i = 0; i < 3; i++)</div><div> {</div><div><span style="white-space:pre-wrap"> </span> string name = "const[" + itos(i) + "]";</div><div><span style="white-space:pre-wrap"> </span> SCIP_CALL(SCIPcreateConsLinear(scip, &cons[i], (const char*)name.c_str(), 0.0, </div>
<div><span style="white-space:pre-wrap"> </span>NULL, NULL, 0, 3+i,</div><div><span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span>TRUE, TRUE, TRUE, TRUE, TRUE,</div>
<div><span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span>FALSE, FALSE, FALSE, FALSE, FALSE</div>
<div><span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span> <span style="white-space:pre-wrap"> </span>));</div>
<div><br></div><div> }</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[0], var[0], 2));</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[0], var[1], 3));</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[0], var[2], 4));</div>
<div><br></div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[1], var[0], 3));</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[1], var[1], 4));</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[1], var[2], 5));</div>
<div><br></div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[2], var[0], 4));</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[2], var[1], 5));</div><div> SCIP_CALL(SCIPaddCoefLinear(scip, cons[2], var[2], 6));</div>
<div> // solve</div><div> SCIP_CALL(SCIPsolve(scip));</div><div> SCIP_CALL(SCIPwriteLP(scip, "triKP"));</div><div> // FILE* f=fopen("tri", "w");</div><div> </div><div> //SCIP_CALL(SCIPprintOrigProblem(scip,f, "lp", 0));</div>
<div><br></div><div><br></div><div><br></div><div> if( SCIPgetNSols(scip) > 0 )</div><div> {</div><div><span style="white-space:pre-wrap"> </span> SCIPinfoMessage(scip, NULL, "\nSolution:\n");</div>
<div><span style="white-space:pre-wrap"> </span> SCIP_CALL( SCIPprintSol(scip, SCIPgetBestSol(scip), NULL, FALSE) );</div><div> }</div><div><br></div><div> SCIP_CALL( SCIPfree(&scip) );</div><div><br></div><div>
return SCIP_OKAY;</div><div>}</div></div><div><br></div></div><div class="gmail_extra"><div><div class="h5"><br><br><div class="gmail_quote">On Tue, Oct 1, 2013 at 2:03 PM, Ambros Gleixner <span dir="ltr"><<a href="mailto:gleixner@zib.de" target="_blank">gleixner@zib.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello Shahin,<br>
<br>
you need to give us some more details. Can you compile SCIP in debug mode (make OPT=dbg), run everything in a debugger, and send us the backtrace?<br>
<br>
Also, how and where exactly do you call SCIPwriteLP()?<br>
<br>
Best regards,<br>
<br>
Ambros<br>
<br>
<br>
Am <a href="tel:01.10.2013%2013" value="+33110201313" target="_blank">01.10.2013 13</a>:41, schrieb Shahin Gelareh:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div>
Dear SCIPers<br>
<br>
I build my model and it solves fine.<br>
I need to extract the LP model to verify my mode.<br>
<br>
When I call it for the first time I get no output and at the same time<br>
no error message.<br>
The next time I run the executable it crashes :(<br>
<br>
Anything I am missing here?<br>
<br>
Best<br>
Shahin<br>
<br>
--<br>
<br>
<br>
<br>
<br></div></div>
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</blockquote></div><br><br clear="all"><div><br></div></div></div><span class="HOEnZb"><font color="#888888">-- <br><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="margin-left:40px">
<img src="http://www.lgi2a.univ-artois.fr/~gelareh/signature.png"><br>
</div></blockquote>
</font></span></div>
</blockquote></div><br><br clear="all"><div><br></div>-- <br><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="margin-left:40px"><img src="http://www.lgi2a.univ-artois.fr/~gelareh/signature.png"><br>
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