how to declare a subset from a set in cplex? - set

Question

i am a new in Cplex , so i want to know how to declare a subset included in a set .
i have a S_i : the set of flight i's Feasible start time tuples.
and i declare this et like this :
int F=...;
range flights = 1..F; // set of flights
{int} S[flights]=...; //Set of feasible start time
and i have a subset S_i (w) ⊆ S_i denote the subset of feasible start time tuples , if w working stations assigned are assigned to flight i.
i declare :
int W=...;
range workingstations=1..W;
but i couldn' t know how to declare the subset, Please help!!!

Answer 1

{string} flights={"A1","A2"};
{string} workingstations={"W1","W2"};
tuple tup {
int sd ; //start time of bagage handling
int sh ; // start time of storage depletion
}
{tup} ttt = {};
tuple Starttime {
int elt; //earlist_starttime
int lst; //lastest_starttime
int ed; //end time of baggage handling
tup tt;
}
tup myt1=<3,4>;
tup myt2=<4,5>;
Starttime S[flights]=[<1,2,3,myt1>,<1,2,9,myt2>];
Starttime S2[flights][workingstations]=[[<1,2,3,myt1>,<1,2,9,myt2>],[<1,2,3,myt1>,<1,2,9,myt2>]];
execute PREPROCESSING {
//initialize tup
var t1 = ttt.add(1,11);
var t2 = ttt.add(2,22);
writeln(ttt);
writeln(S);
writeln(S2);
}
//variables
dvar int+ sd ;
dvar int+ sh;
subject to
{
}
works