C++ GRBModel::addvars() problem

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Sebastían Díaz

2019年09月11日 19:17

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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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  Simranjit Kaur

  • Gurobi Staff

  2024年12月06日 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?.
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  Gwyneth Butera

  • Gurobi Staff

  2019年09月12日 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

  2019年09月12日 15:22

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  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

  2019年09月12日 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

  2019年09月13日 17:48

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  thanks that help me alot

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