Array of sets of sets

[Nouf]

Hello,

I have created an array of sets as follows:
set<int> A[2];
and wrote some code to access it.

Now, I want to create an array of sets of sets. i.e. something to store
A = [{[1],[3]} {[1],[3,4]} where A is an array of two set elements and the second set element also contains a set [3,4] within it.

I tried:
set<set<int>> A[2];
the difinition was compiled. However, I don't know how to access this data structure.

Any ideas of how to implement an array of sets of sets?

Thanks in advance...

[Gaminic]

I've never used sets, but I'm guessing this was the old way:
-Get your set through the array by index.
-Find your int by Key.

Now, add another layer of searching:
-Get your outer set through the array by index.
-Find the inner set you need by Key.
-Find the int by Key.

[johnbob]

hi,

look at the reference for set, everything is explained (constructors, insertion and acessors)
http://www.cplusplus.com/reference/stl/set/

create each embedded set first then insert them in the nested structure.

iesomething like :

  
  set<int> set1_1, set1_2;
  set1_1.insert(1);
  set1_2.insert(3);
  set< set<int> > a1;
  a1.insert(set1_1);
  a1.insert(set1_2);
  A[0] = a1;
//same for the A[1] 

I suppose it should work, but it may not be very optimal, nor very human readable

[Nouf]

Hi,

Thank you very much for the replies...
I have managed to create the data structure as what you said:
set<int> s1, s2;
s1.insert(1);
s2.insert(2);

set<set<int>> A[4];
A[0].insert(s1);
A[0].insert(s2);

Now A[0] contains two sets S1 and s2 exactly as what I want.
The problem is that I couldnt figure out how to write code to access them. I tried to use an iterator but didn't work. For example, how would I display the content of A[0].