int main(int argc, char *argv[])
{
try{
// Set up lp solver
OsiClpSolverInterface lpSolver;
lpSolver.getModelPtr()->setDualBound(1.0e10);
lpSolver.messageHandler()->setLogLevel(0);
// Create BLIS model
BlisModel model;
model.setSolver(&lpSolver);
#ifdef COIN_HAS_MPI
AlpsKnowledgeBrokerMPI broker(argc, argv, model);
#else
AlpsKnowledgeBrokerSerial broker(argc, argv, model);
#endif
// Search for best solution
broker.search(&model);
// Report the best solution found and its ojective value
broker.printBestSolution();
}
catch(CoinError& er) {
std::cerr << "\nBLIS ERROR: \"" << er.message()
<< "\""<< std::endl
<< " from function \"" << er.methodName()
<< "\""<< std::endl
<< " from class \"" << er.className()
<< "\"" << std::endl;
}
catch(...) {
std::cerr << "Something went wrong!" << std::endl;
}
return 0;
}
int main(int argc, char **argv)
{
char *f_name_lp, *last_dot_pos, f_name[256], *f_name_pos;
int i, ncol;
if((argc < 2) || (argc > 2)) {
printf("### ERROR: main(): Usage: One of the following\ncgl_data_test input_file_name.mps\ncgl_data_test input_file_name.lp\n");
exit(1);
}
f_name_lp = strdup(argv[1]);
f_name_pos = strrchr(f_name_lp, '/');
if(f_name_pos != NULL) {
strcpy(f_name, &(f_name_pos[1]));
}
else {
strcpy(f_name, f_name_lp);
}
last_dot_pos = strrchr(f_name, '.');
if(last_dot_pos != NULL) {
last_dot_pos = '\0';
}
OsiClpSolverInterface *clp = new OsiClpSolverInterface;
clp->messageHandler()->setLogLevel(0);
if(strcmp(&(f_name_lp[strlen(f_name_lp)-3]), ".lp") == 0) {
clp->readLp(f_name_lp);
}
else {
if(strcmp(&(f_name_lp[strlen(f_name_lp)-4]), ".mps") == 0) {
clp->readMps(f_name_lp);
}
else {
printf("### ERROR: unrecognized file type\n");
exit(1);
}
}
ncol = clp->getNumCols();
clp->initialSolve();
printf("LP value: %12.2f\n", clp->getObjValue());
OsiCuts cuts;
// Define parameters for CglRedSplit generator
CglParam cpar;
cpar.setMAX_SUPPORT(ncol+1);
CglRedSplitParam rspar(cpar);
// Create a cut generator with the given parameters
CglRedSplit cutGen(rspar);
char *colType = new char[ncol];
for(i=0; i<ncol; i++) {
if(clp->isContinuous(i)) {
colType[i] = 'C';
}
else {
colType[i] = 'I';
}
}
int round, max_rounds = 10;
for(round=0; round<max_rounds; round++) {
cutGen.generateCuts(*clp, cuts);
int ncuts = cuts.sizeRowCuts();
const OsiRowCut **newRowCuts = new const OsiRowCut * [ncuts];
for(i=0; i<ncuts; i++) {
newRowCuts[i] = &cuts.rowCut(i);
}
clp->applyRowCuts(ncuts, newRowCuts);
delete[] newRowCuts;
printf("round %4d: %4d generated cuts new objective value: %12.2f\n",
round, ncuts, clp->getObjValue());
clp->resolve();
if(clp->isAbandoned()) {
printf("###ERROR: Numerical difficulties in Solver\n");
exit(1);
}
if(clp->isProvenPrimalInfeasible()) {
printf("### WARNING: Problem is infeasible\n");
exit(1);
}
}
delete clp;
free(f_name_lp);
delete[] colType;
return(0);
}
