Migrating from CPLEX to Gurobi

Answered

Masoud Kavoosi

• February 07, 2022 21:53

Hi there,

I have a code, which solves the model by CPLEX. I am trying to make necessary changes to solve the model by Gurobi other than CPLEX. However, I do not know what is the Gurobi equivalent of IloCplex. What do I have to write other than 

IloCplex* cplex;

Thanks

Masoud

0

• 

  Maliheh Aramon

  Gurobi Staff

  • February 08, 2022 05:14

  Hi Masoud, 

   

  To solve an optimization problem with CPLEX C++ API, we typically follow the steps below:

  # Create an environment
  IloEnv env;
  # Create an empty model
  IloModel model(env);
  ...
  # Create a solver object
  IloCplex cplex(model);
  # Optimize
  cplex.solve()

  In Gurobi C++ API, we follow similar steps with one difference where there is no need to create a solver object. The optimize() method is directly called on the model object.

  # Create an environment and start it
  GRBEnv env = GRBEnv(true);
  env.start();
  # Create an empty model
  GRBModel model = GRBModel(env);
  ...
  # Optimize
  model.optimize()

  Best regards,

  Maliheh

  0
• 

  Masoud Kavoosi

  • February 08, 2022 13:41

  

  

  

  Thank you, Maliheh!

  Your explanation clears up everything for me.

  Regards!

  Masoud

  0

Please sign in to leave a comment.