WHILE Loop using called functions from shared library

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CJ 2016-4-11

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https://ww2.mathworks.cn/matlabcentral/answers/278477-while-loop-using-called-functions-from-shared-library

评论： Peer Blumido 2020-2-26

I am using Matlab with a library called epanet. I am trying to retrieve water quality data from the simulation when tleft=79200. I do not think the loop is set up correctly. If anyone sees any issues with how I have the loop set up, or any suggestions as to how to do it differently, please let me know.

%Run water quality and extract water age data for nodes of interest.
  t = 0;
  tleft = 1;
  age = 0;
  index = 9693;
  calllib('epanet2','ENopenQ');
  calllib('epanet2','ENinitQ',1);
  while tleft >0
  [error1, t] = calllib('epanet2','ENrunQ',t);
  [error2, tleft] = calllib('epanet2','ENstepQ', tleft);
      if tleft <= 79200
         [errcode, age]=calllib('epanet2','ENgetnodevalue',index, 12, age);    
      end
  end

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Guillaume 2020-2-26

@Peer, this is a 4 year old question, it's unlikely that the OP is still around to tell you if his loop is working or not. In any case, if your problem is generically with calllib and not just calllib when used with this epanet library, then it's a completely unrelared question, so start a new question.

Note that it doesn't work for me is a useless statement if it's not accompanied by

the code that doesn't work
a description of what doesn't work actually mean. If you get an error, then we need the full text of the error messge. If you get a different result than what you expected then we need a description of what you expected and what you got instead.