AI and DS Skills

Hi,

I'm using c++ api for cplex, and I have a function:

void build_model(IloEnv &env, IloModel &model, IloCplex &cplex, int nships) {

  int i;

  IloNumVarArray waiting(env, nships);

  for(i = 0; i < nships; ++i)
    {
      sprintf(_name, "%s_%03d", "w", i + 1);
      wait_variable[i] = IloNumVar(env, 0, 1, ILOINT, _name);
    }

  objective_function = IloSum(wait_variable);
  for(i = 0; i < nships; ++i)
    {
      objective_function += sbta.get_rejection_cost() * sbta.service_time(i) * (1 - served_variable[i]);
    }
  model.add(IloObjective(IloMinimize(env, objective_function, "obj")));

}

}

Another function is calling it:

#include <ilcplex/ilocplex.h>

 int main()
{
  // Initialize cplex environment

  int nships = 10;
  IloEnv env;
  IloModel model(env);
  IloCplex cplex(env);

  // Build generic model
  build_model(env, model, cplex, nships);

// Customize the model

exit(1);

}

I want to modify the model in main function:

How can I define a new objective function?

If build_model includes a constraint in the model "wait_3" how can I delete it in main function.

Thanks, in advance.

#AI and DS Skills

#Decision Optimization