Query the values of a string-valued array attribute.
A non-zero return value indicates that a problem occurred while querying the attribute. Refer to the Error Code table for a list of possible return values. Details on the error can be obtained by calling GRBgeterrormsg.
attrname: The name of a string-valued array attribute. Available attributes are listed and described in the Attributes section of this document.
start: The index of the first entry in the array to retrieve.
len: The number of array entries to retrieve.
values: A pointer to the location where the array attribute should be returned. Note that the result array must be as long as the requested sub-array.
Note that all interface routines that return string-valued attributes are returning pointers into internal Gurobi data structures. The user should copy the contents of the pointer to a different data structure before the next call to a Gurobi library routine. The user should also be careful to never modify the data pointed to by the returned character pointer.
char **varnames[NUMVARS]; error = GRBgetstrattrarray(model, "VarName", 0, NUMVARS, varnames);