//collect1.cpp
//methods for class Collection implemented using composition

#include "collect1.h"

//constructor
Collection::Collection():elements() {};

//returns true if Collection is empty
int Collection::isempty() {
	return elements.isempty();
}

//returns number of elements in the Collection
int Collection::size() {
	int count = 0;
	Node *p = elements.firstnode();

	while(p) {
		count++;
		p = p->getnext();
	}

	return count;
}

//returns true if element belongs to the Collection, otherwise returns false
int Collection::includes(Type elt) {
	return elements.find(elt);
}

//adds an element to the Collection
void Collection::add(Type elt) {
	if (includes(elt))
		return;
	elements.insertfront(elt);
}

//prints out elements of the Collection
void Collection::print() {
	elements.print();
}