
Concept explainers
class sequence
{
public:
// TYPEDEFS and MEMBER SP2020
typedef Item value_type;
typedef std::size_t size_type;
static const size_type CAPACITY = 10;
// CONSTRUCTOR
sequence();
// MODIFICATION MEMBER FUNCTIONS
void start();
void end();
void advance();
void move_back();
void add(const value_type& entry);
void remove_current();
// CONSTANT MEMBER FUNCTIONS
size_type size() const;
bool is_item() const;
value_type current() const;
error: expected initializer before 'sequence'
125 | sequence<Item>value_type sequence ::current() const {
| ^~~~~~~~

Solution:
Given,
TYPEDEFS and MEMBER CONSTANTS typedef double value_type;
typedef
std::size_t
size_type;
static const
size_type
CAPACITY = 30;
CONSTRUCTOR
sequence (
{
used = 0;
current_index = CAPACITY:}
// MODIFICATION MEMBER FUNCTIONS
void start ();
void advance ();
void insert (const value_type & entry);
void attach (const value_type & entry); void remove_current ();
// CONSTANT MEMBER FUNCTIONS s
ize_type size ()
const
{
return used;
}
bool is_item ()
const;
value_type current ()
const;
private: value_type data[CAPACITY); // The array to store items size_type used; // How much of array is used size_type current_index; // Index of current item Write your main()
Step by stepSolved in 3 steps with 3 images

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