Parameter Routines

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 3.3 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 3.3 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.