// -------------------------------------------------------------- -*- C++ -*-
// File: examples/src/ilomipex3.cpp
// Version 8.1
// --------------------------------------------------------------------------
// Copyright (C) 1999-2002 by ILOG.
// All Rights Reserved.
// Permission is expressly granted to use this example in the
// course of developing applications that use ILOG products.
// --------------------------------------------------------------------------
//
// ilomipex3.cpp - Entering and optimizing a MIP problem with SOS sets
// and priority orders. Is a modification of ilomipex1.cpp.
// Note that the problem solved is slightly different than
// mipex1.c so that the output is interesting.
#include <ilcplex/ilocplex.h>
ILOSTLBEGIN
static void
populatebyrow(IloModel model, IloNumVarArray var, IloRangeArray con);
int
main (void) {
IloEnv env;
try {
IloModel model(env);
IloNumVarArray var(env);
IloRangeArray con(env);
populatebyrow (model, var, con);
IloCplex cplex(model);
IloNumVarArray ordvar(env, 2, var[1], var[3]);
IloNumArray ordpri(env, 2, 8.0, 7.0);
cplex.setPriorities (ordvar, ordpri);
cplex.setDirection(var[1], IloCplex::BranchUp);
cplex.setDirection(var[3], IloCplex::BranchDown);
cplex.solve();
env.out() << "Solution status = " << cplex.getStatus() << endl;
env.out() << "Solution value = " << cplex.getObjValue() << endl;
IloNumArray vals(env);
cplex.getValues(vals, var);
env.out() << "Values = " << vals << endl;
cplex.getSlacks(vals, con);
env.out() << "Slacks = " << vals << endl;
cplex.exportModel("mipex3.lp");
}
catch (IloException& e) {
cerr << "Concert exception caught: " << e << endl;
}
catch (...) {
cerr << "Unknown exception caught" << endl;
}
env.end();
return 0;
} // END main
static void
populatebyrow (IloModel model, IloNumVarArray x, IloRangeArray c)
{
IloEnv env = model.getEnv();
x.add(IloNumVar(env, 0.0, 40.0));
x.add(IloNumVar(env, 0.0, IloInfinity, ILOINT));
x.add(IloNumVar(env, 0.0, IloInfinity, ILOINT));
x.add(IloNumVar(env, 2.0, 3.0, ILOINT));
model.add(IloMaximize(env, x[0] + 2 * x[1] + 3 * x[2] + x[3]));
c.add( - x[0] + x[1] + x[2] + 10 * x[3] <= 20);
c.add( x[0] - 3 * x[1] + x[2] <= 30);
c.add( x[1] - 3.5* x[3] == 0);
model.add(c);
model.add(IloSOS1(model.getEnv(),
IloNumVarArray(model.getEnv(), 2, x[2], x[3]),
IloNumArray(env, 2, 25.0, 18.0) ));
} // END populatebyrow
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