never seen a type *fnc (params); before, need clarification on use

[daluu]

I've never seen something like:

class IdClass {
  public:
    IdClass();			// initialize the list
    ~IdClass();			// de-allocate the list

    void Add (void *item, int Key);	// Put item into list
    void *Remove (int Key);
  private:
    IdElement *first;  	// Head of the list, NULL if list is empty
    IdElement *last;		// Last element of list
};

void * IdClass::Remove (int a)
{
  IdElement * tmp = first, * prev = (IdElement *)NULL;
  while ((tmp != NULL) && (tmp->key != a))
  {
    prev = tmp;
    tmp = tmp->next;
  }
  //more code in function here
  return value;
}

How do I use the Remove function if I'm instantiating an instance like this:

IdClass *test;
test = new IdClass();

//for add I can do this
test->Add(itemptr,5);

I don't know how to call Remove. I've never seen that syntax before. And what does that syntax mean?

[viaxd]

void *Remove (int Key);
a function that takes an int and returns a void pointer. in c++ you need to cast the return value to the needed type, i think, not sure

[elad]

int main()
{
  ....
  test.Remove(5);
  ....
}

>>I've never seen that syntax before. And what does that syntax mean?

what part of the which syntax don't you understand?

[daluu]

thanks for the info. and from that info, if "test" was not a pointer to the instance but rather the instance itself, the call to Remove would be

test->Remove(5);

right?

I didn't realize the function was returning a pointer of the type, so I didn't know what was the purpose of defining the function that way. Now I know. thanks.

[elad]

My bad.

test.Remove(5); if test is an object and
test->Remove(5); if test is a pointer to an object.

Sorry. Didn't register in my noggin that test was declared dynamicaly