implement the QueueLinked using the linked list approach. Use C++ programming language

#include "QueueLinked.h"

template QueueLinked::QueueNode::QueueNode(const DataType& nodeData, QueueNode* nextPtr) { }

template QueueLinked::QueueLinked(int maxNumber = Queue::MAX_QUEUE_SIZE) { }

template QueueLinked::QueueLinked(const QueueLinked& other) { }

template QueueLinked& QueueLinked::operator=(const QueueLinked& other) { }

template QueueLinked::~QueueLinked() { }

template void QueueLinked::enqueue(const DataType& newDataItem) throw (logic_error) { }

template DataType QueueLinked::dequeue() throw (logic_error) { DataType temp; return temp; }

template void QueueLinked::clear() { }

template bool QueueLinked::isEmpty() const { return false; }

template bool QueueLinked::isFull() const { return false; }

template void QueueLinked::putFront(const DataType& newDataItem) throw (logic_error) { }

template DataType QueueLinked::getRear() throw (logic_error) { DataType temp; return temp; }

template int QueueLinked::getLength() const { }

template void QueueLinked::showStructure() const { QueueNode *p; // Iterates through the queue

if ( isEmpty() ) cout << "Empty queue" << endl; else { cout << "Front\t"; for ( p = front ; p != 0 ; p = p->next ) { if( p == front ) { cout << '[' << p->dataItem << "] "; } else { cout << p->dataItem << " "; } } cout << "\trear" << endl; } }

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QueueLinked.h

#include #include

using namespace std;

#include "Queue.h"

template class QueueLinked : public Queue { public: QueueLinked(int maxNumber = Queue::MAX_QUEUE_SIZE); QueueLinked(const QueueLinked& other); QueueLinked& operator=(const QueueLinked& other); ~QueueLinked();

void enqueue(const DataType& newDataItem) throw (logic_error); DataType dequeue() throw (logic_error);

void clear();

bool isEmpty() const; bool isFull() const;

// Programming Exercise 2 void putFront(const DataType& newDataItem) throw (logic_error); DataType getRear() throw (logic_error); // Programming Exercise 3 int getLength() const;

void showStructure() const;

private: class QueueNode { public: QueueNode(const DataType& nodeData, QueueNode* nextPtr);

DataType dataItem; QueueNode* next; };

QueueNode* front; QueueNode* back; };