ILOG CPLEX C++ API 9.0 Reference Manual

IloCplex
Note:CPLEX resizes these arrays for you.
For each variable var[i], cstat[i] gives the IIS status for that variable in the IIS,
where the meaning of cstat[i] is:
IloCplex::Lower the lower bound of the variable participates in the IIS
IloCplex::Upper the upper bound of the variable participates in the IIS
IloCplex::Both both variable bounds participate in the IIS
Similarly, for each range constraint rng[i], rstat[i] gives the IIS status for that
constraint in the IIS, where the meaning of rstat[i] is:
IloCplex::Lower the lower bound of the constraint participates in the IIS
IloCplex::Upper the upper bound of the constraint participates in the IIS
IloCplex::Both range is equality constraint and participates in the IIS.
The statuses IloCplex::Lower and IloCplex::Upper are needed only for
constraints that are truly ranged, that is, where both bounds are finite but different.
By definition, if any of the bounds or constraints participating in the IIS is removed, the
IIS becomes feasible. However, this does not mean that the model also becomes feasible
by doing so. Instead, there may be yet another source of infeasiblity in the model.
If the LP has been proven infeasible but no basis is available, IloCplex automatically
invokes the primal simplex optimizer to compute the basis needed for the IIS-finding
algorithm.
public IloInt getIncumbentNode()
This method returns the node number where the current incumbent was found. If the
invoking IloCplex object is an LP or a QP, 0 is returned.
public IloInt getMax(IloCplex::IntParam parameter)
These method return the maximum allowed value for the parameter parameter.
public IloInt getMin(IloCplex::IntParam parameter)
These method return the minimum allowed value for the parameter parameter.
public IloInt getNbarrierIterations()
This method returns the number of barrier iterations from the last solve.
public IloInt getNbinVars()
This method returns the number of binary variables in the matrix representation of the
active model in the invoking IloCplex object.
ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 62