C++ GRBModel::addvars() problem

Answered

Sebastían Díaz

• September 11, 2019 19:17

hi, i am trying to add binary variable to the model but i get and error that i dont know why is happening because i am following the documentation.

i have other variable without the type and it works perfect.

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• 

  Gwyneth Butera

  Gurobi Staff

  • September 12, 2019 11:18

  Hi Sebastian - 

  The fourth argument to addVars() ("type") should be an array of length "count". 

  I hope this helps,

  Gwyneth

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  Sebastían Díaz

  • September 12, 2019 15:22

  

  

  

  I got another error because when i use the array i got invalid type and the constant for binary is "B".

  

  

   

  Thanks for responding. 

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  Gwyneth Butera

  Gurobi Staff

  • September 12, 2019 18:17

  Hi Sebastian - This doesn't work because "B" is not an array of length arcos.size().

  char type[] = {GRB_BINARY, GRB_BINARY, GRB_BINARY};
  ...
  x = model.addVars(0,0,obj,type,name,3);

  I hope this helps.

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  Sebastían Díaz

  • September 13, 2019 17:48

  

  

  

  thanks that help me alot

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