Question

I would like to be sure that this is not wrong: I initialize array with

 double* lower = input->getLowerBox();

where function getLowerBox() returns some double*. is it correct? Or shold I initialize this way::

double* lower = new double[nbP];
for (int i=0;i<nbP;i++)
     lower[i]=input->getLowerBox()[i];

or to avoid multiple calls to getLowerBox,

double* lower = new double[nbP];
double* tmp = input->getLowerBox();
for (int i=0;i<nbP;i++)
     lower[i]=tmp[i];
delete[] tmp;

Answer 1

Two steps recipe:

1. Change Input::getLowerBox() to return std::vector<double> const&
2. Use a copy if you want to modify the returned value, and the const reference instead