Originally posted by: ostaz

Hi everyone,

In OPL, it is possible to declare a tuple of data, like this

tuple link{

int Origin;

int Destination;

};

{link} Links=...;

and then use an identifier l for Links in expressions, such that

for (l in Links)

    do_something (l.origin, l.destination);

Is it possible to do such declaration  with Concert /C++ ?

Thanks in advance

Yes, but it does not involve anything from Concert; you just need to use some container classes from the Standard Template Library.

Paul

Originally posted by: ostaz

Thanks Paul. You mean that it is only related to C++

Yes. In Java I would use a custom class to represent tuples, or maybe a third-party library, or maybe just a length two vector. (Java does not have a native tuples class.) For the set of links, I'd use a HashSet<my tuple class>. I've long since forgotten what container classes the C++ STL has, but I'm sure it has sets, and it may well have a Pair class.

Paul

Originally posted by: ostaz

Many thaks for your valuable advice

Sincerely yours