c++ list

I have to write a class with a function which has a list<string> named logstr.

class write_logList_t : public text_log_i
{
private:
    list<string> logstr;

public:
    inline write_logList_t() : text_log_i() {}

    inline virtual void write(const string_t& description)  { logstr.push_back(description);}   // It seems that it's not the right way to add a string to list of strings.  
    void printList();
};

extern write_logList_t write_logList;

write_logList_t write_logList;
void write_logList_t :: printList()
{
    for (std::list<string>::iterator it=logstr.begin(); it != logstr.end(); ++it)
        std::cout << ' ' << *it;

    cout << endl;
}

int main()
{
    counter_logs_t  counter1;
    write_logList_t write1;
    enum { A, B, C };
    const char* names[] = { "a", "b", "c" };
    state_machine_t sm("3state", 3, A, names);
    /*sm.add_log((log_i*)new cout_log_t());*/
    sm.add_log((log_i*) &counter1);
    sm.add_log((log_i*)new write_logList_t());
    sm.goto_state(A);
    sm.goto_state(B);
    sm.goto_state(C);
    counter1.print_counter();
    write1.printList();

    return 0;
}

For some reason the logstr member is not recognized. When I debug the code and put logstr in watch I can see that it doesn't get any value, instead there is a comment which says:

Couldn't find method std::list, std::allocator >, std::allocator, std::allocator > > >::c_str