Wyznaczanie NWD za pomocą szablonów

#include <iostream>
#include <conio.h>
using namespace std;

template <unsigned A, unsigned B>
struct pNWD
 {
  enum
   {
    wartosc = pNWD<B, A%B>::wartosc
   };
 };

template <unsigned A>
struct pNWD<A, 0>
 {
  enum
   {
    wartosc = A
   };
 };

template <unsigned A, unsigned B>
struct MAX
 {
  enum
   {
    w=(A>B) ? A : B
   };
 };

template <unsigned A, unsigned B>
struct MIN
 {
  enum
   {
    w=(A<B) ? A : B
   };
 };

template <unsigned A, unsigned B>
struct NWD
 {
  enum
   {
    wartosc = pNWD< MAX<A, B>::w, MIN<A, B>::w >::wartosc
   };
 };


int main()
{
 cout<<NWD<23*123, 23*997>::wartosc<<endl;
 getch();
}