Assign a function pointer using template method? -

consider utility class below:

it contain lots of factory methods same signature int function(int a, int b);

utility.h

class utility {  public:      template<typename t, typename a, typename b>      static int get_function(t% function, int% number)     {         function = (t) add;         number = 10;         return 0;     }      static int add (int a, int b) {         return a+b;     } }; 

this contains template method (get_function()) assign function pointers factory methods available in utility class.

main.cpp

typedef int (__stdcall *fp) (int a, int b);   ref class fpclass {         public:         static fp fp;          static int number;          static void apply_function()         {             utility::get_function<fp, int, int>(fpclass::fp, number);             cout <<  fpclass::fp(25, 45);         } };   void main() {     fpclass::apply_function(); } 

what want achieve is, assign function pointer (fpclass::fp) template method (utility:get_function).

but function pointer parameter not modified (always null) called function (utility:get_function). why that?