The following methods are used to set and access parameters for objects of the Concert Technology class IloCplex in C++ and Java:

setParam() getParam() getMin() getMax() getDefault() setDefaults()

Callable Library programs (C and other languages) access and set parameters using the following routines:

In the parameter table, each parameter has a symbolic constant name to be used when referring to it within a program.

• For the Callable Library these constants are capitalized and start with CPX_PARAM_, for example CPX_PARAM_ITLIM. They are used as the second argument in all parameter routines (except CPXsetdefaults which does not require them).
• For C++ programs using Concert Technology, the parameters are defined in nested enumeration types for boolean, integer, floating point, and string parameters. The enum names use mixed (lower and upper) case letters and must be prefixed with IloCplex:: for scoping. For example IloCplex::ItLim is the IloCplex equivalent of CPX_PARAM_ITLIM.
• For Java programs using Concert Technology, the parameters are defined as final static objects in nested classes called IloCplex.BooleanParam, IloCplex.IntParam, IloCplex.DoubleParam, and IloCplex.StringParam for Boolean, integer, floating point, and string parameters, respectively. The parameter object names use mixed (lower and upper) case letters and must be prefixed with the appropriate class for scoping. For example, IloCplex.IntParam.ItLim is the object representing the CPX_PARAM_ITLIM parameter.

An integer reference number for each parameter is shown in the table, corresponding to the value that each symbolic constant represents, as found in the cplex.h header file, but it is strongly recommended that the symbolic constants be used instead of their integer equivalents whenever possible, for the sake of portability to future CPLEX versions.

Some parameters available for the Callable Library are not supported as parameters for IloCplex. In particular:

• Logging output is controlled by a parameter in the Callable Library (CPX_PARAM_SCRIND) but when using Concert Technology you control logging by configuring the output channel IloCplex::out() in C++ or IloCplex.out() in Java.
• Further, the parameters:

  IloCplex::RootAlg IloCplex::NodeAlg

are used where parameters CPX_PARAM_STARTALG and CPX_PARAM_SUBALG would be used for the Callable Library.