mtl ON VC6

hi,
I'm new to MTL and I copied the following code:

#include "mtl/mtl.h"

#include "mtl/utils.h"

#include "mtl/linalg_vec.h"

 using namespace mtl;

using namespace std;

int

main()

{

//begin

const int N = 3;

double dx[] = { 1, 2, 3};

double dy[] = { 3, 0, -1};

typedef external_vec Vec;

Vec x(dx,N), y(dy,N);

print_vector(x);

print_vector(y);

double dotprd = dot(x, y);

if (dotprd == 0)

cout << "Vectors x and y are orthogonal." << endl;

else

cout << "dot(x,y) = " << dotprd << endl;

//end

return 0;

}
 to my VC6 compiler and compiled it but there are some errors as follow:
 :\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(34) : error C2955:
'external_vec' : use of class template requires template argument list
c:\my work\numerical\mtl\mtl-2.1.2-20\mtl-2.1.2-20\mtl\linalg_vec.h(555) :
see declaration of 'external_vec'
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(34) : error C2514:
'mtl::external_vec' : class has no constructors
c:\my work\numerical\mtl\mtl-2.1.2-20\mtl-2.1.2-20\mtl\linalg_vec.h(555) :
see declaration of 'external_vec'
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(34) : error C2262: 'x' :
cannot be destroyed
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(34) : error C2955:
'external_vec' : use of class template requires template argument list
c:\my work\numerical\mtl\mtl-2.1.2-20\mtl-2.1.2-20\mtl\linalg_vec.h(555) :
see declaration of 'external_vec'
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(34) : error C2514:
'mtl::external_vec' : class has no constructors
c:\my work\numerical\mtl\mtl-2.1.2-20\mtl-2.1.2-20\mtl\linalg_vec.h(555) :
see declaration of 'external_vec'
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(34) : error C2262: 'y' :
cannot be destroyed
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(36) : error C2670:
'print_vector' : the template function cannot convert parameter 1 from type
'class mtl::external_vec'
C:\MY WORK\NUMERICAL\LAPACK++\MY TEST\mtl1\11.cpp(37) : error C2670:
'print_vector' : the template function cannot convert parameter 1 from type
'class mtl::external_vec'
Error executing cl.exe.
Can any one give me some suggestions? Thanks
--
xubin

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