I use multi array boost

But I have problem : - I can't declare a multi array as a member variable , I have the error: unexpected "error C2321: syntax error : unexpected 'boost::extents"

When I don' write the keyword "typdef" I have more mistakes.

//Boost library
#include <Boost/multi_array.hpp>
#include <cassert>
//Name Space
using namespace std;
using namespace boost;
class MyClass
{
typedef boost::multi_array<double,2>array_type_2d;

public:

MyClass();
virtual ~MyClass();
array_type_2d M(boost::extents[10][10]);

};

So I want to have : but I don't manage it.

//myClass.h

//////////////////////////

//Boost library
#include <Boost/multi_array.hpp>
#include <cassert>
//Name Space
using namespace std;
using namespace boost;

class myClass

{

boost::multi_array<double,2>array_type_2d;

private :

int dim1, dim2;

array_type_2d MyMatrice(boost::extents[dim1][dim2]) ;

array_type_2d MySecondMatrice(boost::extents[10][10]) ;

};

//myClass.cpp

////////////////////////////////

void myClass::tester()

{

for (int i= 0 ; i<dim1; +)

for(int j=0;j<dim2;j++)

MyMatrice[i][j] = 15;

}

for ( i= 0 ; i<10; +)

for(int j=0;j<10;j++)

MySecondMatrice[i][j] = 0;

}

Thankssss