[Help-glpk] rounding MIP obj values

[Erik Rantapaa]

In the function record_solution(), I was wondering if there is any harm
in including the following code:

      double obj = tree->curr->lp_obj;
      if (tree->int_obj)
      {  double temp = floor(obj+ 0.5);
         if (fabs(obj - temp) <= tree->tol_int)
            obj = temp;
         else
            obj = ceil(obj);
      }
      tree->best[0] = obj;

That is, we round the lp objective value before storing it. This is the same
type of rounding that occurs in the is_better() routine.

Thanks,

Erik Rantapaa


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