look this web site,it is a good tutoria for study C++.
http://www.cplusplus.com/doc/tutorial/

or you can reading "Essential C++" .

the book "Effective C++" have a item introduce cosnt,but a question i dont understand clearly.


class GamePlayer {
private:
static const int NUM_TURNS = 5; // constant eclaration
int...

int main()
{
double charge; // charge minnimum rate of 2 dollars for 3 hours
int hours;

//----------------------------
// Add a input statement

cin >> hours;

I think you can use Access database to store the passwords and use ADO controler to operation the database.