3D array C++ using int [] operator

Question

I\'m new to C/C++ and I\'ve been cracking my head but still got no idea how to make an \"structure\" like this

Answer 1

What you're trying to do is not idiomatic in C++. Of course, you can use a int***pointer for this, but this is strongly discouraged. In C++ we have better ways to get there.

vector > > foo (5,vector >(4, vector(3)));

This will result in something with the memory layout similar to what you asked for. It supports dynamic resizing and inner vectors to have different sizes just like in your picture. In addition, you don't have to worry about manual allocation / deletion of any of it. Also, the vectors know their size so you don't have to remember it somewhere.

But if you just want a "rectangular" 3D array where all the elements are consecutivly stored in the same memory block, you could use a boost::multiarray.