STL newbie: calling member functions through lists

Hi,

Iam trying to teach myself STL list containers, i haven't been able to figure out how to call a member function for individual objects in a list, I have a list consisting of objects.

heres the code:

Code:

---

#include<iostream>
#include<list>

using namespace std;

class test
{
        int num;
        public:
        test() {}
        test(int a) { num = a; }
        int getnum() { return num;}
};

int main()
{
        list<test> tlist;
        list<test>::iterator titerator;
        tlist.push_back(99);
        int i = *titerator.getnum(); //wont compile
       
        return 0;
}

---

Vectors are a lot simpler, i just use the index and dot operator :) I have looked quite a few online tutorials, but haven't found one dealing with a situation like this.

Suppose i remove an element from a vector (say myvec[10]), now would myvec[10] be empty(NULL)??? or do elements shift up to fill in the empty space?

help!

Code:

---

int main()
{
  list<test> tlist;       
 
  tlist.push_back(99);
  list<test>::iterator titerator = tlist.begin(); // don't let it unitialized!
  int i = (*titerator).getnum(); // this does compile.
  int j = titerator->getnum(); // this compile also
 
  return 0;
}

---

Thank you very much :)