Question

I got stuck in a programming task. I want the elements of my stl vector to be placed in a

contiguous memory to send it with MPI_Send() routine.

here is an example:

class Tem
{

//...
private: 
 vector<double> lenghtVector (4500);//this gives a compilation error but I need to have a fixed sized vector

};

how can I have a vector with a serial memory of should I do something else?

Thanks.
Kindest Regards.

SRec

Answer 1

The elements of a vector are stored contiguously according to C++ Standard (23.2.4/1). To resize it you could use appropriate constructor in the initializer list of Tem class.:

class Tem
{
  Tem() : lenghtVector(4500) {};
private: 
 vector<double> lenghtVector;
};