[SCIP] C++ Wrapper for SCIP

[Ivo Hedtke]

Hi SCIP experts,

My team at DB Schenker is testing SCIP after the license changed some months ago. Some of us are struggling with the cumbersome C interface.

Is there a C++ wrapper around SCIP that simplifies things by automatic memory management etc? Which ones are available?

If not, we wrote for our own use-cases a wrapper and we would also contribute that back to the open-source community. Should we do that as an independent project, or should we contribute back to SCIP? I attach an example of the usage of our wrapper.

BR, Ivo

BOOST_AUTO_TEST_CASE(KnapsackViaSCIP)
{
    vector<int> w { 3, 4, 3, 3, 3, 3, 4, 2, 4, 1 };
    vector<int> v { 230, 134, 52, 60, 151, 95, 201, 245, 52, 55 };
    int c { 14 };

    Model model("KNAPSACK");
    auto x { model.addVars("x_", w.size(), v, VarType::BINARY) };
    LinExpr weight;
    for (size_t i { 0 }; i < w.size(); i++) {
        weight += w.at(i) * x.at(i);
    }
    model.addConstr(weight <= c, “capacity");
    model.setObjsense(Sense::MAXIMIZE);
    model.setParam(params::limits::MaxSol, 1);
    model.setParam(params::display::VerbLevel, 0);

    model.solve();
    BOOST_TEST(model.getPrimalbound() == 882);
}