I'm getting errors that say "no suitable constructor exists to convert from "const char [21]" to "DequeEmpty""

THIS IS THE CPP FILE

#include

#include

#include

#include

#include "LinkedDeque.hpp"

#include "DLinkedList.hpp"

#include "DLinkedList.cpp"

LinkedDeque::LinkedDeque()// constructor

: D(), n(0) { }

int LinkedDeque::size() const// number of items in the queue

{ return n; }

bool LinkedDeque::empty() const// is the queue empty?

{ return n == 0; }

// get the front element

const Elem& LinkedDeque::front() const throw(DequeEmpty) {

if (empty())

throw DequeEmpty("front of empty Deque");

return D.front();// linkedlist front is queue front

}

// insert new first element

void LinkedDeque::insertFront(const Elem& e) {

D.addFront(e);

n++;

}

// insert new last element

void LinkedDeque::insertBack(const Elem& e) {

D.addBack(e);

n++;

}

// remove first element

void LinkedDeque::removeFront() throw(DequeEmpty) {

if (empty())

throw DequeEmpty("removeFront of empty deque");

D.removeFront();

n--;

}

// remove last element

void LinkedDeque::removeBack() throw(DequeEmpty) {

if (empty())

throw DequeEmpty("removeBack of empty deque");

D.removeBack();

n--;

}

THIS IS THE HEADER FILE

#ifndef LINKEDDEQUE_H

#define LINKEDDEQUE_H

#include

#include "DLinkedList.hpp"

#include "DLinkedList.cpp"

class DequeEmpty

{

public:

std::string what()

{

return "MyException happened";

}

};

typedef std::string Elem; // deque element type

class LinkedDeque

{ // deque as doubly linked list

public:

LinkedDeque(); // constructor

int size() const; // number of items in the deque

bool empty() const; // is the deque empty?

const Elem& front() const throw(DequeEmpty); // first element

const Elem& back() const throw(DequeEmpty); // last element

void insertFront(const Elem& e); // insert new first element

void insertBack(const Elem& e); // insert new last element

void removeFront() throw(DequeEmpty); // remove first element

void removeBack() throw(DequeEmpty); // remove last element

private:

DLinkedList D; // doubly linked list of elements

int n; // number of elements

};

#endif