ILOG CPLEX C++ API 9.0 Reference Manual

IloCplex
This method creates and returns a goal that puts the search specified by goal under the
limit defined by limit. Only the subtree controlled by goal will be subjected to limit
limit.
public void presolve(IloCplex::Algorithm alg)
This method performs Presolve on the model. The enumeration alg tells Presolve
which algorithm is intended to be used on the reduced model; NoAlg should be
specified for MIP models.
public void qpIndefCertificate(IloNumVarArray var,
IloNumArray x)
The quadratic objective terms in a QP model must form a positive semi-definite Q
matrix (negative semi-definite for maximization). If IloCplex finds that this is not
true, it will discontinue the optimization. In such cases, the qpIndefCertificate
method can be used to compute assignments (returned in array x) to all variables
(returned in array var) such that the quadratic term of the objective function evaluates
to a negative value (x'Q x < 0 in matrix terms) to prove the indefiniteness.
Note: CPLEX resizes these arrays for you.
public void readBasis(const char * name)
Reads a simplex basis from the BAS file indicated by name, and copies that basis into
the invoking IloCplex object. The parameter AdvInd must be set to a nonzero value
(e.g. its default setting) for the simplex basis to be used to start a subsequent
optimization with one of the Simplex algorithms.
By convention, the file extension is .bas. The BAS file format is documented in the
reference manual ILOG CPLEX File Formats.
public void readMIPStart(const char * name)
Reads the MST file indicated by name and copies the MIP start information into the
invoking IloCplex object. The parameter MIPStart must be turned on in order for
the MIP start information to be used to with a subsequent MIP optimization. The default
value for the parameter is off.
By convention, the file extension is .mst. The MST file format is documented in the
reference manual ILOG CPLEX File Formats.
public void readOrder(const char * filename)
This method reads a priority order from an file in ORD format into the invoking
IloCplex object. The names in the ORD file must match the names in the active
model. The priority order will be associated with the model. The parameter
ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 70