Problem with vector arrays in c++

Question

How do i find a certain given index in an array and then at that index go to a sub array and print the value of the element present at the second index given for the sub array? (vector arrays)
Update:
I have an initial array of 2 elements 0 and 1
0 has further array associated 3 elements 4,5,6
1 has another array with 5 elements 5,6,8,9,3
I generate a query to search for an index such I can print this value at the given query index

Answer 1

Mmm can you explain better or show your question with a code example?

Answer 2

Is this what you mean?

1 2 3 4 3 6 2 1 1 // Myvec.

Search for 2.

1 '2' 3 4 3 6 2 1 1. // At 1.
Sub Vector - 3 4 3 6 2 1 1

Researching for 2 in sub vector:

3 4 3 6 '2' 1 1 // At 4 in subvector, 6 in main vector

If yes, Ill give you the code, though you just need to iterate over using find().