C: Pointers to function

Check the following code and comments

void func(int);
int main()
{
   void (*fp)(int);
   fp = func;  // following two are the same
   fp = &func;
   (*fp)(1);   // same result
   fp(2);
   return 0;
}
void func(int a)
{
   printf ("%d\n", a);
}

c-faq explains the details in 4.12 and 1.34. Note that either func(3) or (*func)(3) is legal too.

Also check The Function Pointer Tutorials