//List ADT Implemantation

#include <iostream>

using namespace  std;

const int MAX = 100;

class List
{	int length;
	int data[MAX];	// assuming: integer list
public:
	List()	// empty: length = 0
	{	length = 0;	}
	int Length()	// observer
	{	return length;	}
	bool IsEmpty() const 	// observer
	{	return length == 0;	}
	bool IsFull() const	// observer
	{	return length == MAX;	}
	void Insert(int item)	// transformer
	{ 	data[length] = item; length++;	}	
	void Print() const
	{ 	for(int i = 0;	i<length; i++)
			cout << data[i] << " ";
		cout << endl;
	} 
};

int main()
{	
	List list1;
	int item;
	cout << "Length: " << list1.Length() << endl;	// 0
	while(cin)	
	{	list1.Insert(item);
		cout << "Input an Integer: ";
		cin >> item;
	}
	// debug
	cout << "Length: " << list1.Length() << endl; // 4
	cout << "The list: " ;
	list1.Print();
	cout << " \n\nGoodbye.\n\n";
	return 0;
}