Tipo reference & Puntatori in CPP

TestCPP.cpp

//============================================================================
// Name        : TestCPP.cpp
// Author      : Domenico Monaco
// Version     :
// License     : GPLv2
// Copyright   : Domenico Monao 2012 -
// Description : Hello World in C++, Ansi-style
//============================================================================

#include <iostream>
using namespace std;

int & first(int* a);

class Queue {
	int items[100];
	int front, rear;
public:
	Queue(){
		front = 1;
		items[front] = 14;
		items[2] = 7;
		items[front] = 20;
	}

	int & first(Queue * q) {


		//return q->items[front];
		return (*q).items[front];
	}
};

int & first(int* a) {
	//cout << "" << *a;
	return *a;
}


int main() {

	cout << "!!!Hello World!!!" << endl; // prints !!!Hello World!!!

	int *q;
	int b;
	int i;


	b = 3;
	q = &b;

	first(q)++;

	i = first(q);

	first(q) = 10;

	cout << "" << i << endl;

	cout << "" << (*q) << endl;

	cout << "" << (b) << endl;

	cout << "" << &b << endl;
	cout << "" << &i << endl;
	cout << "" << &q << endl;

	cout << "###########" << endl;


	Queue p;

	int test = p.first(&p);

	cout << "#0 " << test << endl;

	p.first(&p)++;
	cout << "#1 " << p.first(&p) << endl;

	p.first(&p) = p.first(&p) + 1;
	cout << "#2 " << p.first(&p) << endl;

	//Non funziona
	//p.first(&p)*  = p.first(&p) + 1;
	//cout << "#3 " << p.first(&p) << endl;

	return 0;
}