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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• Official comment

  

  Simranjit Kaur

  Gurobi Staff

  • December 06, 2024 00:54

  This post is more than three years old. Some information may not be up to date. For current information, please check the Gurobi Documentation or Knowledge Base. If you need more help, please create a new post in the community forum. Or why not try our AI Gurobot?.
• 

  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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