ILOG CPLEX C++ API 9.0 Reference Manual

IloCplex
priorities are given preference over integer variables with lower priorities. Further,
variables that have priority values assigned to them are given preference over variables
that don't. Priorities must be positive integers.
public void setPriority(IloNumVar var,
IloNum pri)
This method sets the priority order for the variable var to pri. During branching,
integer variables with higher priorities are given preference over integer variables with
lower priorities. Further, variables that have priority values assigned to them are given
preference over variables that don't. Priorities must be positive integers.
public void setPWLFormulation(IloCplex::PWLFormulation f)
This method allows you to control the way piecewise linear expressions are represented
when CPLEX automatically transforms them during extraction.
public void setVectors(const IloNumArray x,
const IloNumArray dj,
const IloNumVarArray var,
const IloNumArray slack,
const IloNumArray pi,
const IloRangeArray rng)
This method allows a user to specify a starting point for the following invocation of the
solve method. Zero can be passed for any of the parameters. However, if x or dj is
not zero, var must not be zero either. Similarly, if slack or pi is not zero, rng must
not be zero either.
For all variables in var, x[i] specifies the starting value for the variable var[i].
Similarly, dj[i] specifies the starting reduced cost for variable var[i]. For all
ranged constraints specified in rng, slack[i] specifies the starting slack value for
rng[i]. Similarly, pi[i] specifies the starting dual value for rng[i].
This information is exploited at the next call to solve, to construct a starting point for
the algorithm, provided that the AdvInd parameter is set to a value greater than or
equal to one. In particular, if the extracted model is an LP, and the root algorithm is dual
or primal, the information is used to construct a starting basis for the simplex method for
the original model, if AdvInd is set to 1 (one). If AdvInd is set to 2, the information
is used to construct a starting basis for the presolved model.
If the extracted model is a MIP, only x values can be used, and a value must be specified
for all variables of type ILOINT. If the provided values are compatible with an integer
feasible solution, that solution becomes the incumbent for the next search; otherwise,
the starting information is ignored. The parameter IloCplex::MIPStart must be
turned on (that is, set to IloTrue) for the starting point to take effect.
public IloBool solve(IloCplex::Goal goal)
This method initializes the goal stack of the root node with goal before starting the
branch & cut search. The search tree will be defined by the execute method of goal and
ILOG CPLEX C++ API 9.0 REFERENCE M ANUAL 73