Variable number of elements in 2d array

Question

I want to initialize a 2d array which its elements number in each row is not constant.

Something like: int a[][] = {{1,2,3}, {4,5}};

How do I achieve that?

You just did. Those values can be changed, since you declared them as not `const`. If you want the number of elements to change, then you must use another data structure, such as `vector`. — E_net4 - Krabbe mit Hüten, Apr 11 '14 at 14:04
try [std::vector of std::vector of nt](http://ideone.com/oMT48x) — Dmitry Ledentsov, Apr 11 '14 at 14:06

score 1 · Answer 1 · answered Apr 11 '14 at 14:08

1

You can't achieve this using a raw 2d array. What you can do is use a vector that holds other vectors. For instance in your case you could do:

std::vector<std::vector<int>> a = { {1, 2, 3}, {4, 5} };

answered Apr 11 '14 at 14:08

Veritas

1 Answers1