93 #ifndef SEQUENCE_H 94 #define SEQUENCE_H 95 96 99 100 101 102 103 104 97 98 { 105 106 107 108 109 110 111 112 113 114 115 116 117 #include // provides size_t 118 119 120 namespace CS3358_FA2022 class sequence { public: // TYPEDEFS and MEMBER CONSTANTS typedef double value_type; typedef std::size_t size_type; static const size_type DEFAULT_CAPACITY // CONSTRUCTORS and DESTRUCTOR sequence (size_type initial_capacity sequence (const sequence& source); ~sequence(); // MODIFICATION MEMBER FUNCTIONS void resize(size_type new_capacity); void start(); = = 30; DEFAULT_CAPACITY); void advance(); void insert (const value_type& entry); void attach(const value_type& entry); void remove_current(); sequence& operator=(const sequence& source); // CONSTANT MEMBER FUNCTIONS size_type size() const; bool is_item() const;
// CLASS PROVIDED: sequence (part of the namespace CS3358_FA2022)
//
// TYPEDEFS and MEMBER CONSTANTS for the sequence class:
// typedef ____ value_type
// sequence::value_type is the data type of the items in the sequence.
// It may be any of the C++ built-in types (int, char, etc.), or a
// class with a default constructor, an assignment operator, and a
// copy constructor.
//
// typedef ____ size_type
// sequence::size_type is the data type of any variable that keeps
// track of how many items are in a sequence.
//
// static const size_type DEFAULT_CAPACITY = _____
// sequence::DEFAULT_CAPACITY is the default initial capacity of a
// sequence that is created by the default constructor.
//
// CONSTRUCTOR for the sequence class:
// sequence(size_type initial_capacity = DEFAULT_CAPACITY)
// Pre: initial_capacity > 0
// Post: The sequence has been initialized as an empty sequence.
// The insert/attach functions will work efficiently (without
// allocating new memory) until this capacity is reached.
// Note: If Pre is not met, initial_capacity will be adjusted to 1.
//
// MODIFICATION MEMBER FUNCTIONS for the sequence class:
// void resize(size_type new_capacity)
// Pre: new_capacity > 0
// Post: The sequence's current capacity is changed to new_capacity
// (but not less that the number of items already on the sequence).
// The insert/attach functions will work efficiently (without
// allocating new memory) until this new capacity is reached.
// Note: If new_capacity is less than used, it will be made equal to
// to used (in order to preserve existing data). Thereafter, if Pre
// is not met, new_capacity will be adjusted to 1.
//
// void start()
// Pre: none
// Post: The first item on the sequence becomes the current item
// (but if the sequence is empty, then there is no current item).
//
// void advance()
// Pre: is_item returns true.
// Post: If the current item was already the last item in the
// sequence, then there is no longer any current item. Otherwise,
// the new current item is the item immediately after the original
// current item.
//
// void insert(const value_type& entry)
// Pre: none
// Post: A new copy of entry has been inserted in the sequence
// before the current item. If there was no current item, then
// the new entry has been inserted at the front of the sequence.
// In either case, the newly inserted item is now the current item
// of the sequence.
//
// void attach(const value_type& entry)
// Pre: none
// Post: A new copy of entry has been inserted in the sequence after
// the current item. If there was no current item, then the new
// entry has been attached to the end of the sequence. In either
// case, the newly inserted item is now the current item of the
// sequence.
//
// void remove_current()
// Pre: is_item returns true.
// Post: The current item has been removed from the sequence, and
// the item after this (if there is one) is now the new current
// item. If the current item was already the last item in the
// sequence, then there is no longer any current item.
//
// CONSTANT MEMBER FUNCTIONS for the sequence class:
// size_type size() const
// Pre: none
// Post: The return value is the number of items in the sequence.
//
// bool is_item() const
// Pre: none
// Post: A true return value indicates that there is a valid
// "current" item that may be retrieved by activating the current
// member function (listed below). A false return value indicates
// that there is no valid current item.
//
// value_type current() const
// Pre: is_item() returns true.
// Post: The item returned is the current item in the sequence.
// VALUE SEMANTICS for the sequence class:
// Assignments and the copy constructor may be used with sequence
// objects.
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