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→Part 1: Integer Linked List: Finished IntList
=== Class: IntListNode, Files: [intlist.h, intlist.cpp], Test: 0 ===
An IntListNode is a an integer linked list node, as such it holds an integer value and a pointer to an IntListNode that is the next node in the list. If the next link is NULL then the current node is considered the '''last node in the list'''.<br/>Note that the next property of this class has a public getter and a protected setter; this is intentional as client code should not mess with the '''structure''' of our linked list.<br/>While this class is only used by IntList, it is expected to have a set of its own functionality.
It is expected that the '''class declaration''' for this class lie in '''intlist.h''' and the definition code lie in '''intlist.cpp'''.
; IntListNode(int v = int(), IntListNode* n = NULL): Constructor. Note the default values. Initializes the internally held value to v and the next pointer to n.
; IntListNode(const IntListNode& src): Copy constructor. Should initialize the internally held value to src's internally held value. Should initialize '''next''' to '''NULL'''.
; IntListNode& operator=(const IntListNode& src): Assignment operator. Should set the internally held value to src's internally held value. Should set '''next''' to '''NULL'''. Should do '''NOTHING''' in the case of '''self-assignment''' (ie IntListNode x; x = x;). Returns a reference to the current object.
; ~IntListNode(): Destructor. As this node does not allocate any memory, this function can remain empty.
; IntListNode* next() const: Next getter. Returns the internally held next pointer.
=== Class: IntList, Files [intlist.h, intlist.cpp], Test: 0 ===
An IntList is the actual integer linked list class. It manages a sequence of IntListNode. Because it needs to be able to set the next pointer on IntListNode objects, this class '''may''' need to be a friend of the IntListNode class (this depends on how you implement these classes).
The exact specs follow:
==== Internal Variables ====
; IntListNode* _head: The head of the list. Should be NULL when the list is empty.
; int _size: The number of elements currently in the list.
==== Public Functions ====
; IntList(): Default constructor. Should set size to 0 and head to NULL.
; IntList(const IntList& src): Copy constructor. Should copy the list of nodes managed by '''src'''. This means that an entirely new list of nodes must be created, one node for each node managed by '''src''', and the value held by each of those nodes must '''equal''' the value held by the corresponding node managed by '''src'''. When this constructor is finished, the size of the current list should be the same as the size of src.<br/><br/>'''TIP:''' After initializing the current object to a '''safe and empty state''', don't forget that you can call '''any member function''' that the current list has!
; IntList& operator=(const IntList& src): Assignment operator. Should behave similarly to the copy constructor. '''ADDITIONALLY:''' Should do '''NOTHING''' in the case of '''self-assignment''' (ie IntList x; x = x;). If taking action, should clear the list of all nodes before creating new ones ('''make sure that you do NOT leak memory!'''). Should return a reference to the current object.
; int size() const: Size getter. Returns the current value of the size member.
; IntListNode* head() const: Head getter. Returns the current value of the head pointer.
; void push(int v): Adds a new node to the '''end of the list''' holding the value v. Should increment size.
; void pop(): Destroys the last node in the list. Should do '''NOTHING''' if the list is currently empty. Should decrement size if a node was destroyed. '''NOTE:''' If a node was destroyed, make sure that '''ANY POINTERS POINTING TO IT''', that your code has access to, are set to NULL.
; void clear(): Destroys all nodes in the list. Has no effect if the list is currently empty. When this function is finished, head should point to NULL and size should be 0.
