list.cpp

#include "list.h"

void List::append(int x) {
	if (_size == 0) {
		first->data = x;
		_size = 1;
		return;
	}
	node *save = last;
	node * new_node = new node;
	last->next = new_node;
	last = new_node;
	last->before = save;
	last->next = nullptr;
	last->data = x;
	_size++;
}

List::List() {
	_size = 0;
	first = new node;
	first->data = 0;
	first->next = nullptr;
	last = first;
}

int List::get(int index) {
	node *current = first;
	for (int i = 0; i != index; i++) {
		current = current->next;
	}
	return current->data;
}

void List::set(int index, int value) {
	node *current = first;
	for (int i = 0; i != index; i++) {
		current = current->next;
	}
	current->data = value;
}