Hello everyone, I am having some trouble trying to get my circularly linked list to work. It does compile but it gives a Segmentation fault. This is my first time learning something like this and I don't really know whats wrong. If anyone could possibly point out some problems it would help a lot.
Header File:
#include <string>
#include <iostream>
#ifndef ARRAYLIST_H
#define ARRAYLIST_H
using namespace std;
class ArrayListException
{
public:
ArrayListException(const string& aMessage)
{
message=aMessage;
}
string what() const
{
return message;
}
private:
string message;
};
template <typename T>
class ArrayList
{
public:
cout<<"liststart";
ArrayList<T>();
cout<<"listfinish";
virtual ~ArrayList<T>();
ArrayList<T>(const ArrayList<T>& rhs);
void add(T element);
void add(int index, T element) throw(ArrayListException);
T& operator[](int index)const throw(ArrayListException);
T remove(int index) throw(ArrayListException);
long size() const;
private:
template <typename U> class Node;
Node<T>* rear;
Node<T>* head;
long length;
};
template <class U>
template <typename T>
class ArrayList<U>::Node
{
public:
Node(T s);
private:
T data;
Node<T>* next;
friend class ArrayList<U>;
};
CPP File:
#include <iostream>
#include <cassert>
#include <string>
#include "arraylist.h"
using namespace std;
template <typename T>
ArrayList<T>::ArrayList()
{
head=NULL;
rear=NULL;
length=0;
}
template<typename T>
ArrayList<T>::ArrayList(const ArrayList<T>& rhs)
{
int i;
for(i=0; i<rhs.size(); i++)
{
T element = rhs[i];
add(element);
}
}
template <typename T>
ArrayList<T>::~ArrayList()
{
Node<T>* tmp;
while(head)
{
tmp=head;
head=head->next;
delete tmp;
}
}
template<typename T>
void ArrayList<T>::add(T element)
{
Node<T>* tmp;
Node<T>* newNode=new Node<T>(element);
if(length==0)
{
head = newNode;
}
else
{
rear->next=newNode;
rear=rear->next;
}
length++;
}
template<typename T>
void ArrayList<T>::add(int index, T element) throw(ArrayListException)
{
if(index<0||index>length)
throw ArrayListException("Stack Exception: top() called on empty stack.");
Node<T>* newnode=new Node<T>(element);
this[index-1]->next=newnode;
newnode->next=this[index];
}
template<typename T>
T& ArrayList<T>::operator[](int index)const throw(ArrayListException)
{
if(index<0||index>length-1 )
throw ArrayListException("Stack Exception: top() called on empty stack.");
int i;
Node<T>*tmp;
tmp=head;
for(i=0; i<index; i++)
tmp=tmp->next;
return tmp->data;
}
template<typename T>
T ArrayList<T>::remove(int index) throw(ArrayListException)
{
Node<T>* nodePtr;
T item;
if(index<0||index>length-1)
throw ArrayListException("Stack Exception: top() called on empty stack.");
return head->data;
}
template<typename T>
long ArrayList<T>::size() const
{
return length;
}
template <class U>
template <typename T>
ArrayList<U>::Node<T>::Node(T s)
{
data=s;
next=NULL;
}
Thank You
Unsolved 
