#include <iostream>
#include <cstdlib>
#include <list>
#include "obj.h"
using namespace std;

int main()
{
	const int a[] = {20, 30, 40};
	const size_t n = sizeof a / sizeof a[0];
	list<obj> li(a, a + n);

	obj o1 = 10;
	li.push_front(o1);

	obj o2 = 50;
	li.push_back(o2);

	for (list<obj>::const_iterator it = li.begin(); it != li.end(); ++it) {
		cout << *it << "\n";   //or (*it).print() or it->print()
	}

	for (list<obj>::iterator it = li.begin(); it != li.end();) {
		if (*it == 20) {         //if ((*it).operator int() == 20) {
			it = li.erase(it);   //Calls the object's destructor.
		} else {
			++it;
		}
	}

	for (list<obj>::const_iterator it = li.begin(); it != li.end(); ++it) {
		cout << *it << "\n";
	}

	return EXIT_SUCCESS;
}