The following MakeResource function receives these arguments: the model defining the problem, a name to be given to the resource, and an array of activities requiring the resource. The argument numberOfActivities indicates the size of that array.

void
MakeResource(IloModel model,
             const char* name,
             IloInt numberOfActivities,
             IloActivityArray activities)
{
  IloEnv env = model.getEnv();
  IloUnaryResource resource(env, name);
  for (IloInt i = 0; i < numberOfActivities; i++)
    model.add(activities[i].requires(resource));
}
 

This function is then called once for each resource of the problem. For example, the following code creates the CATERPILLAR resource and the resource requirement constraints for the filling activities.

  IloActivityArray V(env,2);
  V[0]=V1; V[1]=V2;
  MakeResource(model, "CATERPILLAR", 2, V);