In c++, please and thank you.StringQueue.h provided. **StringQueue**A regular queue that stores string values. In the template, you're provided with prototypes of the public member functions. Feel free to add any private variables/functions, but leave public function prototypes unchanged. You may use a linked list or an array to store the strings. You will need to implement the member functions in the StringQueue.cpp file (not provided). A test driver is provided in "downloadable files".- **StringQueue(int n)** Initializes the queue. `n` is the maximum size of the queue.- **~StringQueue()** Cleans up the dynamically allocated memory (if any). Must be defined, even if empty.- **int enqueue(string)** Adds string `s` to the queue; returns the position of the string in the added queue (front of queue is position 1—hint: it's the number of elements). It should not succeed if the queue is full.- **string dequeue()** Returns the next value. It should not succeed if the queue is empty.- **bool isEmpty()** Returns true if the queue is empty, otherwise returns false.- **bool isFull()** Returns true if the queue is full, otherwise returns false. The queue is full if it contains `n` elements, where `n` is the maximum size of the queue (from the constructor).- **void display(ostream& out)** Outputs the elements in the queue numbered starting at 1, one per line, from front to rear, to the ostream. Use `out` in place of `cout`. Below is the transcription and explanation of the provided C++ code for a `StringQueue` class, which would be suitable for an educational website offering a tutorial on data structures in C++.---```cpp#include using namespace std;class StringQueue{private: // Add your member variables here // You may use an array or linked list or ...public: // Constructor StringQueue(int); ~StringQueue(); // You can remove this if you're using a static array // Queue operations int enqueue(string); // Returns position where inserted, front is 1 string dequeue(); bool isEmpty(); bool isFull; void display(ostream& out);};```### Explanation:**1. Header and Namespace:**- `#include `: This is a preprocessor directive that includes the standard `` library, allowing the use of string data types in the code.- `using namespace std;`: This declares the use of the `std` namespace, which includes the standard library features, so you don't need to prefix `std` before standard types and objects (e.g., `string` instead of `std::string`).**2. Class Declaration:**- `class StringQueue`: This declares a class named `StringQueue` which will encapsulate the properties and behaviors of a queue data structure designed to store strings.**3. Access Specifiers:**- `private`: This section is for declaring member variables that are not accessible outside the class. You need to define necessary variables to implement the queue, e.g., an array or linked list for storage.- `public`: This section allows members (functions) to be accessed from outside the class.**4. Constructor and Destructor:**- `StringQueue(int)`: A constructor that initializes the `StringQueue` object. It may take an integer argument, possibly to define the size of the queue.- `~StringQueue()`: A destructor that is used for cleanup when a `StringQueue` object is destroyed. It can be omitted if a static array is used instead of dynamic memory.**5. Queue Operations:**- `int enqueue(string)`: A method to add a string to the queue. It returns the position where the new element is inserted, with the front of the queue starting at 1.- `string dequeue()`: A method to remove and return the

that stores string values. In the template, you're provided with prototypes of the bles/functions, but leave public function prototypes unchanged. You may use a implement the member functions in the StringQueue.cpp file (not provided). A te ue(int n) Initializes the queue. n is the maximum size of the queue. (if) 0.04 alle alle

that stores string values. In the template, you're provided with prototypes of the bles/functions, but leave public function prototypes unchanged. You may use a implement the member functions in the StringQueue.cpp file (not provided). A te ue(int n) Initializes the queue. n is the maximum size of the queue. (if) 0.04 alle alle

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Types of Linked List

A sequence of data elements connected through links is called a linked list (LL). The elements of a linked list are nodes containing data and a reference to the next node in the list. In a linked list, the elements are stored in a non-contiguous manner and the linear order in maintained by means of a pointer associated with each node in the list which is used to point to the subsequent node in the list.

Linked List

When a set of items is organized sequentially, it is termed as list. Linked list is a list whose order is given by links from one item to the next. It contains a link to the structure containing the next item so we can say that it is a completely different way to represent a list. In linked list, each structure of the list is known as node and it consists of two fields (one for containing the item and other one is for containing the next item address).

Question

In c++, please and thank you.

StringQueue.h provided.

**StringQueue**

A regular queue that stores string values. In the template, you're provided with prototypes of the public member functions. Feel free to add any private variables/functions, but leave public function prototypes unchanged. You may use a linked list or an array to store the strings. You will need to implement the member functions in the StringQueue.cpp file (not provided). A test driver is provided in "downloadable files".

- **StringQueue(int n)** Initializes the queue. `n` is the maximum size of the queue.
- **~StringQueue()** Cleans up the dynamically allocated memory (if any). Must be defined, even if empty.
- **int enqueue(string)** Adds string `s` to the queue; returns the position of the string in the added queue (front of queue is position 1—hint: it's the number of elements). It should not succeed if the queue is full.
- **string dequeue()** Returns the next value. It should not succeed if the queue is empty.
- **bool isEmpty()** Returns true if the queue is empty, otherwise returns false.
- **bool isFull()** Returns true if the queue is full, otherwise returns false. The queue is full if it contains `n` elements, where `n` is the maximum size of the queue (from the constructor).
- **void display(ostream& out)** Outputs the elements in the queue numbered starting at 1, one per line, from front to rear, to the ostream. Use `out` in place of `cout`.

Below is the transcription and explanation of the provided C++ code for a `StringQueue` class, which would be suitable for an educational website offering a tutorial on data structures in C++.

---

```cpp
#include <string>
using namespace std;

class StringQueue
{
private:
// Add your member variables here
// You may use an array or linked list or ...

public:
// Constructor
StringQueue(int);
~StringQueue(); // You can remove this if you're using a static array

// Queue operations
int enqueue(string); // Returns position where inserted, front is 1
string dequeue();
bool isEmpty();
bool isFull;
void display(ostream& out);
};
```

### Explanation:

**1. Header and Namespace:**
- `#include <string>`: This is a preprocessor directive that includes the standard `<string>` library, allowing the use of string data types in the code.
- `using namespace std;`: This declares the use of the `std` namespace, which includes the standard library features, so you don't need to prefix `std` before standard types and objects (e.g., `string` instead of `std::string`).

**2. Class Declaration:**
- `class StringQueue`: This declares a class named `StringQueue` which will encapsulate the properties and behaviors of a queue data structure designed to store strings.

**3. Access Specifiers:**
- `private`: This section is for declaring member variables that are not accessible outside the class. You need to define necessary variables to implement the queue, e.g., an array or linked list for storage.
- `public`: This section allows members (functions) to be accessed from outside the class.

**4. Constructor and Destructor:**
- `StringQueue(int)`: A constructor that initializes the `StringQueue` object. It may take an integer argument, possibly to define the size of the queue.
- `~StringQueue()`: A destructor that is used for cleanup when a `StringQueue` object is destroyed. It can be omitted if a static array is used instead of dynamic memory.

**5. Queue Operations:**
- `int enqueue(string)`: A method to add a string to the queue. It returns the position where the new element is inserted, with the front of the queue starting at 1.
- `string dequeue()`: A method to remove and return the

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