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Parameter Routines

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You can set many parameters in the ILOG CPLEX environment to control ILOG CPLEX operation. The values of these parameters may be integer, double, or character strings, so there are sets of routines for accessing and setting them.

Table 4.3 Callable Library Routines for Parameters in the ILOG CPLEX Environment
Type 
Change value 
Access current value 
Access default, max, min 
integer 
CPXsetintparam 
CPXgetintparam 
CPXinfointparam 
double 
CPXsetdblparam 
CPXgetdblparam 
CPXinfodblparam 
string 
CPXsetstrparam 
CPXgetstrparam 
CPXinfostrparam 
Table 4.3 shows you the names and purpose of these routines. Each of these routines accepts the same first argument: a pointer to the ILOG CPLEX environment (that is, the pointer returned by CPXopenCPLEX). The second argument of each of those parameter routines is the parameter number, a symbolic constant defined in the header file, cplex.h. Managing Parameters from the Callable Library offers more details about parameter settings.

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