Write the definitions of the functions to overload the assignment operator and copy constructor for the class queueType. Also, write a program (in main.cpp) to test these operations. HEADER FILE FOR queueAsArray.h //Header file QueueAsArray #ifndef H_QueueAsArray #define H_QueueAsArray #include #include #include "queueADT.h" using namespace std; template class queueType: public queueADT { public: const queueType& operator=(const queueType&); //Overload the assignment operator. bool isEmptyQueue() const; //Function to determine whether the queue is empty. //Postcondition: Returns true if the queue is empty, // otherwise returns false. bool isFullQueue() const; //Function to determine whether the queue is full. //Postcondition: Returns true if the queue is full, // otherwise returns false. void initializeQueue(); //Function to initialize the queue to an empty state. //Postcondition: count = 0; queueFront = 0; // queueRear = maxQueueSize – 1 Type front() const; //Function to return the first element of the queue. //Precondition: The queue exists and is not empty. //Postcondition: If the queue is empty, the program // terminates; otherwise, the first // element of the queue is returned. Type back() const; //Function to return the last element of the queue. //Precondition: The queue exists and is not empty. //Postcondition: If the queue is empty, the program // terminates; otherwise, the last // element of the queue is returned. void addQueue(const Type& queueElement); //Function to add queueElement to the queue. //Precondition: The queue exists and is not full. //Postcondition: The queue is changed and queueElement // is added to the queue. void deleteQueue(); //Function to remove the first element of the queue. //Precondition: The queue exists and is not empty. //Postcondition: The queue is changed and the first // element is removed from the queue. queueType(int queueSize =100); //Constructor queueType(const queueType& otherQueue); //Copy constructor ~queueType(); //Destructor private: int maxQueueSize; //variable to store the maximum queue size int count; //variable to store the number of //elements in the queue int queueFront; //variable to point to the first //element of the queue int queueRear; //variable to point to the last //element of the queue Type *list; //pointer to the array that holds //the queue elements }; template bool queueType::isEmptyQueue() const { return (count ==0); } //end isEmptyQueue template bool queueType::isFullQueue() const { return (count == maxQueueSize); } //end isFullQueue template void queueType::initializeQueue() { queueFront = 0; queueRear = maxQueueSize - 1; count = 0; } //end initializeQueue template Type queueType::front() const { assert(!isEmptyQueue()); return list[queueFront]; } //end front template Type queueType::back() const { assert(!isEmptyQueue()); return list[queueRear]; } //end back template void queueType::addQueue(const Type& newElement) { if (!isFullQueue()) { queueRear = (queueRear + 1) % maxQueueSize; //use mod //operator to advance queueRear //because the array is circular count++; list[queueRear] = newElement; } else cerr << "Cannot add to a full queue." << endl; } //end addQueue template void queueType::deleteQueue() { if (!isEmptyQueue()) { count--; queueFront = (queueFront + 1) % maxQueueSize; //use the //mod operator to advance queueFront //because the array is circular } else cerr << "Cannot remove from an empty queue." << endl; } //end deleteQueue //Constructor template queueType::queueType(int queueSize) { if (queueSize <=0) { cerr << "Size of the array to hold the queue must " <<"be positive."<< endl; cerr << "Creating an array of size 100." << endl; maxQueueSize = 100; } else maxQueueSize = queueSize; //set maxQueueSize to //queueSize queueFront = 0; //initialize queueFront queueRear = maxQueueSize - 1; //initialize queueRear count = 0; list = new Type[maxQueueSize]; //create the array to //hold the queue elements } //end constructor //Destructor template queueType::~queueType() { delete [] list; } //end destructor //Add definition for overloaded assignment operator //Add definition for copy constructor #endif
Write the definitions of the functions to overload the assignment operator and copy constructor for the class queueType. Also, write a program (in main.cpp) to test these operations. HEADER FILE FOR queueAsArray.h //Header file QueueAsArray #ifndef H_QueueAsArray #define H_QueueAsArray #include #include #include "queueADT.h" using namespace std; template class queueType: public queueADT { public: const queueType& operator=(const queueType&); //Overload the assignment operator. bool isEmptyQueue() const; //Function to determine whether the queue is empty. //Postcondition: Returns true if the queue is empty, // otherwise returns false. bool isFullQueue() const; //Function to determine whether the queue is full. //Postcondition: Returns true if the queue is full, // otherwise returns false. void initializeQueue(); //Function to initialize the queue to an empty state. //Postcondition: count = 0; queueFront = 0; // queueRear = maxQueueSize – 1 Type front() const; //Function to return the first element of the queue. //Precondition: The queue exists and is not empty. //Postcondition: If the queue is empty, the program // terminates; otherwise, the first // element of the queue is returned. Type back() const; //Function to return the last element of the queue. //Precondition: The queue exists and is not empty. //Postcondition: If the queue is empty, the program // terminates; otherwise, the last // element of the queue is returned. void addQueue(const Type& queueElement); //Function to add queueElement to the queue. //Precondition: The queue exists and is not full. //Postcondition: The queue is changed and queueElement // is added to the queue. void deleteQueue(); //Function to remove the first element of the queue. //Precondition: The queue exists and is not empty. //Postcondition: The queue is changed and the first // element is removed from the queue. queueType(int queueSize =100); //Constructor queueType(const queueType& otherQueue); //Copy constructor ~queueType(); //Destructor private: int maxQueueSize; //variable to store the maximum queue size int count; //variable to store the number of //elements in the queue int queueFront; //variable to point to the first //element of the queue int queueRear; //variable to point to the last //element of the queue Type *list; //pointer to the array that holds //the queue elements }; template bool queueType::isEmptyQueue() const { return (count ==0); } //end isEmptyQueue template bool queueType::isFullQueue() const { return (count == maxQueueSize); } //end isFullQueue template void queueType::initializeQueue() { queueFront = 0; queueRear = maxQueueSize - 1; count = 0; } //end initializeQueue template Type queueType::front() const { assert(!isEmptyQueue()); return list[queueFront]; } //end front template Type queueType::back() const { assert(!isEmptyQueue()); return list[queueRear]; } //end back template void queueType::addQueue(const Type& newElement) { if (!isFullQueue()) { queueRear = (queueRear + 1) % maxQueueSize; //use mod //operator to advance queueRear //because the array is circular count++; list[queueRear] = newElement; } else cerr << "Cannot add to a full queue." << endl; } //end addQueue template void queueType::deleteQueue() { if (!isEmptyQueue()) { count--; queueFront = (queueFront + 1) % maxQueueSize; //use the //mod operator to advance queueFront //because the array is circular } else cerr << "Cannot remove from an empty queue." << endl; } //end deleteQueue //Constructor template queueType::queueType(int queueSize) { if (queueSize <=0) { cerr << "Size of the array to hold the queue must " <<"be positive."<< endl; cerr << "Creating an array of size 100." << endl; maxQueueSize = 100; } else maxQueueSize = queueSize; //set maxQueueSize to //queueSize queueFront = 0; //initialize queueFront queueRear = maxQueueSize - 1; //initialize queueRear count = 0; list = new Type[maxQueueSize]; //create the array to //hold the queue elements } //end constructor //Destructor template queueType::~queueType() { delete [] list; } //end destructor //Add definition for overloaded assignment operator //Add definition for copy constructor #endif
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Question
Write the definitions of the functions to overload the assignment operator and copy constructor for the class queueType.
Also, write a program (in main.cpp) to test these operations.
HEADER FILE FOR queueAsArray.h
//Header file QueueAsArray
#ifndef H_QueueAsArray
#define H_QueueAsArray
#include<iostream>
#include <cassert>
#include "queueADT.h"
using namespace std;
template <class Type>
class queueType: public queueADT<Type>
{
public:
const queueType<Type>& operator=(const queueType<Type>&);
//Overload the assignment operator.
bool isEmptyQueue() const;
//Function to determine whether the queue is empty.
//Postcondition: Returns true if the queue is empty,
// otherwise returns false.
bool isFullQueue() const;
//Function to determine whether the queue is full.
//Postcondition: Returns true if the queue is full,
// otherwise returns false.
void initializeQueue();
//Function to initialize the queue to an empty state.
//Postcondition: count = 0; queueFront = 0;
// queueRear = maxQueueSize – 1
Type front() const;
//Function to return the first element of the queue.
//Precondition: The queue exists and is not empty.
//Postcondition: If the queue is empty, the program
// terminates; otherwise, the first
// element of the queue is returned.
Type back() const;
//Function to return the last element of the queue.
//Precondition: The queue exists and is not empty.
//Postcondition: If the queue is empty, the program
// terminates; otherwise, the last
// element of the queue is returned.
void addQueue(const Type& queueElement);
//Function to add queueElement to the queue.
//Precondition: The queue exists and is not full.
//Postcondition: The queue is changed and queueElement
// is added to the queue.
void deleteQueue();
//Function to remove the first element of the queue.
//Precondition: The queue exists and is not empty.
//Postcondition: The queue is changed and the first
// element is removed from the queue.
queueType(int queueSize =100);
//Constructor
queueType(const queueType<Type>& otherQueue);
//Copy constructor
~queueType();
//Destructor
private:
int maxQueueSize; //variable to store the maximum queue size
int count; //variable to store the number of
//elements in the queue
int queueFront; //variable to point to the first
//element of the queue
int queueRear; //variable to point to the last
//element of the queue
Type *list; //pointer to the array that holds
//the queue elements
};
template <class Type>
bool queueType<Type>::isEmptyQueue() const
{
return (count ==0);
} //end isEmptyQueue
template <class Type>
bool queueType<Type>::isFullQueue() const
{
return (count == maxQueueSize);
} //end isFullQueue
template <class Type>
void queueType<Type>::initializeQueue()
{
queueFront = 0;
queueRear = maxQueueSize - 1;
count = 0;
} //end initializeQueue
template <class Type>
Type queueType<Type>::front() const
{
assert(!isEmptyQueue());
return list[queueFront];
} //end front
template <class Type>
Type queueType<Type>::back() const
{
assert(!isEmptyQueue());
return list[queueRear];
} //end back
template <class Type>
void queueType<Type>::addQueue(const Type& newElement)
{
if (!isFullQueue())
{
queueRear = (queueRear + 1) % maxQueueSize; //use mod
//operator to advance queueRear
//because the array is circular
count++;
list[queueRear] = newElement;
}
else
cerr << "Cannot add to a full queue." << endl;
} //end addQueue
template <class Type>
void queueType<Type>::deleteQueue()
{
if (!isEmptyQueue())
{
count--;
queueFront = (queueFront + 1) % maxQueueSize; //use the
//mod operator to advance queueFront
//because the array is circular
}
else
cerr << "Cannot remove from an empty queue." << endl;
} //end deleteQueue
//Constructor
template <class Type>
queueType<Type>::queueType(int queueSize)
{
if (queueSize <=0)
{
cerr << "Size of the array to hold the queue must "
<<"be positive."<< endl;
cerr << "Creating an array of size 100." << endl;
maxQueueSize = 100;
}
else
maxQueueSize = queueSize; //set maxQueueSize to
//queueSize
queueFront = 0; //initialize queueFront
queueRear = maxQueueSize - 1; //initialize queueRear
count = 0;
list = new Type[maxQueueSize]; //create the array to
//hold the queue elements
} //end constructor
//Destructor
template <class Type>
queueType<Type>::~queueType()
{
delete [] list;
} //end destructor
//Add definition for overloaded assignment operator
//Add definition for copy constructor
#endif
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