How to declare and use a function pointer?

/*********************

**********************/

I'm trying to declare a function pointer in class A and set it in class B, but I get
syntax errors. How can I get this to compile and run?

thanks,
Sam

class A {
   public:
      A(void) {
      }
      virtual ~A() {
      }
      void (*func)(int i, bool b); // trying to declare a function pointer
};

/*********************

**********************/

class B {

   public:
      B(void) {
         a = new A();

         a->func = &func(int i, bool b); // <<<<<<<<<< syntax error <<<<<<<<<<<<<<

         // Microsoft visual studio error messages about the above line:
         // error C2144: syntax error : missing ')' before type 'int'
         // error C2660: 'func' : function does not take 0 parameters
         // error C2059: syntax error : ')'

      }
      virtual ~B() {
         delete a;
      }
      A *a;
      void func(int i, bool b) {
         return;
      }

};

/***************************************************************************
   I need to have this so that different 'B'-type classes can
   change the behavior of A::func
***************************************************************************/

int main(int argc, char *argv[]) {
   B *b = new B();

   b->a->func(99, true); // should call B::func()

   delete b;

   return 0;
}