I need an array for the integer variables of an optimization problem. When I use
IloNumVarArray x = CreateNumVarArray (env, 100, "x");
I have x1 to x100 but they are not integers.
Changed the code to
IloIntVarArray x = CreateIntVarArray (env, 100, "x");
and I tried to add an objective function using these variables with
IloObjective obj = IloMinimize(env, IloSum(x));
model.add(obj);
The objective function is fine, all my variables are integers too, but now i have bounds like
x1=0
x2=0
...
x100=0
Any help on how to get those integer variables in an array without the bounds?
but which status do you get for cplex? Unbounded?
Let me replicate your model in OPL:
range r=1..100;
dvar int x[r];
minimize sum(i in r) x[i];
subject to
{
}
execute
{
writeln(x[1].LB);
writeln(cplex.status);
}
which gives
-2147483647
2
The status 2 means unbounded. And you see the Lower Bound of x[1] is very low So what you did is fine and does not set any bounds
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