Select the objective function.

0 if function executed successfully, 1 otherwise.

XPRBprob prob;
XPRBctr ctr3;
XPRBarrvar tobj;
   ...
tobj = XPRBnewarrvar(prob, 10, XPRB_PL, "tabo", 0, 800);
ctr3 = XPRBnewsum(prob, "r3", tobj, XPRB_N, 0);
XPRBsetobj(prob, ctr3);

This defines a non-binding constraint, ctr3, and then sets it as the objective function.

This functions sets the objective function by selecting a constraint the variable terms of which become the objective function. This must be done before any optimization task is carried out. Typically, the objective constraint will have the type XPRB_N (non-binding), but any other type of constraint may be chosen too. In the latter case, the equation or inequality expressed by the constraint also remains part of the problem.

XPRBgetsense, XPRBsetsense.