how to write function which assigned ID for members in registration system

[Palestina]

im writing program supposed to manage conference , i need at the beginning to allow the user of this system to register as members , then they can log in and using the facilities in the system , what i need is the way to assign IDs to these members after they register.

i have class for user contain method register , so any user object can use this method to register , after that he will be member , at member class which inherit the user class , there is additional attribute named ID , this ID value should be assigned using the system , how ? what is the function ? any idea ?
ID must be unique

[Palestina]

any idea

[Palestina]

hi all
i have 2 classes , 1 of them use the other as below

the student class which use course class

#ifndef _STUDENT_H_
#define _STUDENT_H_
#include <iostream>
#include <string>
#include "Course.h"

using namespace std;
class Student
{
    int id;
    string name;
    string matrixNo;
    Course* course;
public:
	Student();
    Student(int, string, string);
    void registerCourse(Course&);
};

#endif 

course class below

#ifndef _COURSE_H_
#define _COURSE_H_
#include <iostream>
#include <string>

using namespace std;
class Course
{
    int id;
    string name;
    string code;
public:
	Course();
    Course(int, string, string);
};

#endif 

can u help me , i wanna know how to access the course which is used in student class ?
example i wanna print the course which registered by student .

#include <iostream>
#include "Course.h"
#include "Student.h"

using namespace std;
int main()
{
	Student student1(1,"Ahmad","BIT1234");
	Course course1(1,"Bachelor in IT","BIT");
	student1.registerCourse(course1);
	cout<<student1.id<<"\n"<<student1.name<<"\n"<<student1.matrixNo<<"\n"<<student1.course<<"\n";/////my problem here 
	system("PAUSE");
}

it print the address of course , not the value

[Texan40]

student1.course is just pointing to (I'm assuming) an instance of Course that was created in the registerCourse() function. If you want to access the members use this notation:

student.course->id // Course.id
student.course->name // Course.name

etc...

[vetal10]

i wonder how you can get access to Student fields?if you want to print information about Student make a method print or etc..
or you can overload << operator. but don't forget do it in Course class too

[mik2718]

You can use a static variable to keep track of the number of students.
Then use this as the student id

class Student
{
   static int nextid;
    int id;
    string name;
    string matrixNo;
    Course* course;
public:
    Student()
    {
        id = nextid;
        ++nextid;
    }
};

You will need to initialise the static variable in the cpp file

int Student::nextid = 1;

[Palestina]

Thank u all .
Texan40 , it works correctly now , i know i face troubles in understanding pointers .
mike2718, thank u very much it was helpful idea , thank u all .
i hope 1 day i can be professional like u and i can help others.