Go4Expert - c++ multiple choice quiz

Create a C++ program to run a simple multiple choice quiz on C++. The quiz should have questions such as this:
Question 1
How do you declare a variable x to be a pointer to a constant integer?
1) int * const x
2) int const * const x
3) int const *x
4) int *x
Select answer (1-4) :>

The program should have two classes called Question and Quiz.
The Question class should hold all the data and methods for a single question with four different possible answers.
It should include fields to hold:
1) The question;
2) The possible answers;
3) The marks for each answer;
4) A comment to give to a user for each choice of answer;
5) The answer selected by the user.
It should have methods to:
1) Display the question;
2) Obtain an answer from the user;
3) Return the user’s score;
4) Display the comments.
The Quiz class should hold an array of up to 20 questions. It should have methods to:
1) Present the questions in order;
2) Display the total score;
3) Take the user through their answers showing the correct answer and the comment.
Both classes may have other fields, methods or constructors as appropriate.
You should have a main method that sets up a quiz with 4 questions, runs the quiz and displays the scores and comments.
I have no idea how to create these classes!please help!!

Code:



//COM316 Coursework 2 2011

//B00515808

#include<iostream>

#include<cstdlib>

#include<string>

#include<conio.h>

usingnamespace std;

constint MAX_QUESTIONS=20;

　

class Question //question class

{

int questionMarks;

string possibleAns;

int chosenAnswer;

string question;

public:

Question();

void setQuestion(string q);

int (string); //declare method

void setQuestion();

void show();

private:

　

};

class Quiz //quiz class

{

string questions;

public:

Quiz();

void run();

void questions();

Question questions[MAX_QUESTIONS];



private:

int number_of_questions;

};

void Question::setQuestion(string q)

{

question=q;



}

void Question::show()

{

cout<< question << endl;

}

void Quiz::run()

{

for(int i=0;i<number_of_questions;i++)

{

cout<<"Question" << i+1 << endl;

questions[i].show();

}

}

int Quiz::Question(string s) //question method

{



//holds information for questions

return 0;

}

string Quiz::questions(string s) //quiz method

{

return 0;

}

//array of questions

　

int main () //main method

{

Quiz q;

q.questions[0].setQuestion("What colour is");

q.run();

_getch();

return 0;

　

}//main