Originally posted by: babyvera

Hi all. I am the beginner of the c++ cplex. I have a qusetion about the IloNumVarArray. I spend 5 days on this question,but failed.

First  I use  'IloNumVarArray' to set up a array with 5 elements, named f. Then use 'add' to make 5 arrays become a 5*5 matrix named fij. Third I want to row sum. Except use fij[1]+ fij[2]+ fij[3]+ fij[4]+ fij[5] , Are there any other way to solve this problem? Because the model have 1047*1047 matrix,  I will write down  fij[1]+ fij[2]...........fij[1047]. That maybe a hard work.

Thank you!!!

Hi,

have a look at cplex\examples\src\cpp\ilodiet.cpp for example:

you will read

IloExpr expr(env);
      for (j = 0; j < n; j++) {
         expr += Buy[j] * nutrPer[i][j];
      }
      mod.add(nutrMin[i] <= expr <= nutrMax[i]);
      expr.end();

and may adapt this sum to your specific problem

regards

Originally posted by: babyvera

Thank you for you help!!