Vector of double pointers

[hadichko]

Hi, I would like to use push_back in order to fill up a vector, containing double pointers. However, when I delete the pointers after pushing them back into the vector, the vector gets emptied as well:

double * Vertex;
vector < double * > Vertices;
Vertex = new double[3];
Vertex[0] = 1.0;
Vertex[1] = 2.0;
Vertex[2] = 3.0;
Vertices.push_back(Vertex);
delete Vertex;

After deleting Vertex, the vector does not return the values anymore. What is the correct way of doing this?

Thank you!

[Peter87]

If you delete the array the pointer that you just inserted will get invalid. It does no longer points to a valid array object.

Instead of storing pointers I think you should store actual objects. If you want something similar to a regular array you can use std::array, but you could also create your own struct or class to hold the values of each vertex.

vector<array<double, 3>> Vertices;
array<double, 3> Vertex = {1.0, 2.0, 3.0};
Vertices.push_back(Vertex);