RE: [Boost-Users] Newbie trying to use multi_array ...

From: Klaus Nowikow (nowikow_at_[hidden])
Date: 2002-10-23 02:39:20

Hi!

> I'd like to have a class with a 4-D array. Initially it won't contain 
> any data. However, Microsoft Visual C++ v6.0 complains about 
> not finding 
> a constructor.

I think the problem is, multi_array does not have a standard constructor.
You have to provide the array size at construction time.
In your example: Add a constructor

foobar::foobar()
:	m_ar(boost::extents[r0][r1][r1][r3])
{ }

where r0...r3 is the maximum array size in the respective dimensions.

Cheers,

Klaus

> I want to do something like this:
> 
> #include "boost/multi_array.hpp"
> typedef boost::multi_array<std::complex<double>, 4> t_Array4D;
> 
> class foobar
> {
>    t_Array4D ar;
> };
> 
> void foobar::SetValue()
> {
>    // set extents code
> 
>    // set value
>    this->ar[0][0][0][0] = 2.0;
> }