Exercise20_02.cpp - #include #include...

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#include <iostream> #include <stdexcept> #include <string> using namespace std; #ifndef LINKEDLIST_H #define LINKEDLIST_H template<typename T> class Node { public: T element; // Element contained in the node Node<T> *next; // Pointer to the next node // No-arg constructor Node() { next = NULL; } // Constructor Node(T element) { this->element = element; next = NULL; } }; template<typename T> class Iterator : public std::iterator<std::forward_iterator_tag, T> { public: Iterator(Node<T>* p) { current = p; } Iterator operator++() { current = current -> next; return *this; }; T& operator*() { return current -> element; } bool operator==(const Iterator<T> &iterator) { return current == iterator.current; } bool operator!=(const Iterator<T> &iterator) { return current != iterator.current; } private: Node<T>* current; }; template<typename T> class LinkedList
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{ public: LinkedList(); LinkedList(LinkedList<T>& list); virtual ~LinkedList(); void addFirst(T element); void addLast(T element); T getFirst() const; T getLast() const; T removeFirst() throw (runtime_error); T removeLast(); void add(T element); void add(int index, T element); void clear(); bool contains(T element) const; T get(int index) const; int indexOf(T element) const; bool isEmpty() const; int lastIndexOf(T element) const; void remove(T element); int getSize() const; T removeAt(int index); T set(int index, T element); Iterator < T > begin() { return Iterator<T>(head); }; Iterator < T > end() { return Iterator < T > (tail->next); }; private: Node<T>* head;
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