Solving Concert Technology Models with IloCplex

ILOG CPLEX generally does not need to be involved while you create your model. However, once the model is set up, it is time to create your cplex object, that is, an instance of the class IloCplex, to be used to solve the model. IloCplex is a class derived from IloAlgorithm.. There are other Concert Technology algorithm classes, also derived from IloAlgorithm.. Some models might also be solved by using other algorithms, such as the class IloSolver for constraint programming, or by using a hybrid algorithm consisting of both IloSolver and ILOG CPLEX. Some models, on the other hand, cannot be solved with ILOG CPLEX.

Table 1.1 Concert Technology Modeling Objects
To model:	Use:
numerical variables	objects of class `IloNumVar`, as long as they are not constructed with a list of feasible values
semi-continuous variable	objects of class `IloSemiContVar`
linear objective functions	objects of class `IloObjective` with linear or piecewise linear expressions
quadratic objective functions	objects of class `IloObjective` with quadratic expressions
linear constraints	objects of class `IloRange` with linear or piecewise linear expressions
variable type conversions	objects of class `IloConversion`
special ordered sets of type 1	objects of class `IloSOS1`
special ordered sets of type 2	objects of class `IloSOS2` and
constraints	objects of class `IloAnd.`

For a description of special ordered sets see Using Special Ordered Sets. The last class, IloAnd, is listed for completeness only and is generally not used with ILOG CPLEX, except with the class IloSolution, as described in the ILOG Concert Technology User's Manual.