// List ADT implementation

#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() const
	{	return length;      }
	bool IsEmpty() const
	{	return length == 0;   }
	bool IsFull() const
	{	return length == MAX; }
	void Insert(int item) 
	{	data[length] = item; length++;	}
	void Print() const
	{	for(int i=0; i<length; i++)
			cout << data[i] << " ";
		cout << endl;
	}
};

int main()
{	// Q: declare a List obj. list1?
	List list1;
	// Q: Out the length of list1?
	cout << "Length: " << list1.Length() << endl;   // 0
	// Q: inset 1 to the list?
	list1.Insert(1);
	list1.Insert(11);
	list1.Insert(7);
	list1.Insert(8);
	// check the length?
	 cout << "Length: " << list1.Length() << endl; // 4
	// Q: out the list to the screen?
	cout << "The list is: ";
	list1.Print();

	//debug
	cout << "\n\nBye.\n\n";
	return 0;
}