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The routine CPXinfointparam is used to obtain the default,
 minimum, and maximum values of a CPLEX parameter of type
 int.
The reference manual ILOG CPLEX Parameters provides a list of parameters with their types, options, and default values.
Example
 status = CPXinfointparam (env, CPX_PARAM_PREIND, &default_preind,
                           &min_preind, &max_preind);| env | A pointer to the CPLEX environment as returned by   | 
| whichparam | The symbolic constant (or reference number) of the parameter for which the value is to be obtained.  | 
| defvalue_p | A pointer to an integer variable to hold the default value of the CPLEX parameter. May be NULL.  | 
| minvalue_p | A pointer to an integer variable to hold the minimum value of the CPLEX parameter. May be NULL.  | 
| maxvalue_p | A pointer to an integer variable to hold the maximum value of the CPLEX parameter. May be NULL.  |