Advantages of classes with only static methods in C++

Question

Even though there are no static classes in C++, coming from a Java background I use to create a helper class like Util containing only static methods. Is this c

Answer 1

In C++, classes with only static methods is mostly used in template metaprogramming.

For example, I want to calculate fibonacci numbers at compile-time itself, and at runtime I want them to print only, then I can write this program:

#include 

template
struct Fibonacci 
{
   static const int value = Fibonacci::value + Fibonacci::value;
   static void print()
   {
       Fibonacci::print();
       std::cout << value << std::endl;
   }
};


template<>
struct Fibonacci<0>
{
   static const int value = 0;
   static void print()
   {
       std::cout << value << std::endl;
   }
};

template<>
struct Fibonacci<1>
{
   static const int value = 1;
   static void print()
   {
       Fibonacci<0>::print();
       std::cout << value << std::endl; 
   }
};

int main() {
        Fibonacci<20>::print(); //print first 20 finonacci numbers
        return 0;
}

Online demo : http://www.ideone.com/oH79u