Xor Linked List in C++

This C++ Program demonstrates operations on Xor Linked List.

Here is source code of the C++ Program to demonstrate XOR Linked List. The C++ program is successfully compiled and run on a Linux system. The program output is also shown below.

```
/* 
```

 * C++ Program To Implement XOR Linked List

```
 */
```
```
#include <iostream>
```
```
#include <cstdlib>
```
```
using namespace std;
```
```
/* 
```
```
 * Node Declaration
```
```
 */
```
```
struct node
```
```
{
```
```
    int data;
```
```
    struct node* npx;
```
```
}*head;
```
```
 
```
```
/*
```
```
 * Class Declaration
```
```
 */
```
```
class xor_list
```
```
{
```
```
    public:
```

        node* XOR (struct node *a, struct node *b);

        void insert(struct node **head_ref, int data);

        void display (struct node *head);

```
        xor_list()
```
```
        {
```
```
            head = NULL;	
```
```
        }
```
```
};
```
```
 
```
```
/*
```
```
 * Main Contains Menu
```
```
 */
```
```
int main()
```
```
{
```
```
    xor_list xl;
```
```
    int choice, item;
```
```
    while (1)
```
```
    {
```
```
        cout<<"\n-------------"<<endl;
```

        cout<<"Operations on XOR Linked List"<<endl;

```
        cout<<"\n-------------"<<endl;
```

        cout<<"1.Insert Element at First"<<endl;

```
        cout<<"2.Display List"<<endl;
```
```
        cout<<"3.Quit"<<endl;
```
```
        cout<<"Enter your Choice: ";
```
```
        cin>>choice;
```
```
        switch(choice)
```
```
        {
```
```
        case 1:
```

            cout<<"Enter value to be inserted: ";

```
            cin>>item;
```
```
            xl.insert(&head, item);
```
```
            break;
```
```
        case 2:
```
```
            xl.display (head);
```
```
            break;
```
```
        case 3:
```
```
            exit(1);
```
```
            break;
```
```
        default:
```
```
            cout<<"Wrong Choice"<<endl;
```
```
        }
```
```
    }
```
```
    return 0;
```
```
}
```
```
 
```
```
/* 
```

 * Returns XORed value of the node addressed

```
 */
```

node *xor_list::XOR (struct node *a, struct node *b)

```
{
```

    return (node*) ((unsigned int) (a) ^ (unsigned int) (b));

```
}
```
```
 
```
```
/* 
```
```
 * Insert Node at Beginning
```
```
 */
```

void xor_list::insert(struct node **head_ref, int data)

```
{
```

    node *new_node  = new (struct node);

```
    new_node->data = data;
```

    new_node->npx = XOR (*head_ref, NULL);

```
    if (*head_ref != NULL)
```
```
    {
```

        node* next = XOR ((*head_ref)->npx,  NULL);

        (*head_ref)->npx = XOR (new_node, next);

```
    }
```
```
    *head_ref = new_node;
```
```
}
```
```
 
```
```
// Display List
```

void xor_list::display (struct node *head)

```
{
```
```
    node *curr = head;
```
```
    node *prev = NULL;
```
```
    node *next;
```

    cout<<"Elements of XOR Linked List: "<<endl;

```
    while (curr != NULL)
```
```
    {
```
```
        cout<<curr->data<<" ";
```
```
        next = XOR (prev, curr->npx);
```
```
        prev = curr;
```
```
        curr = next;
```
```
    }
```
```
    cout<<endl;
```
```
}
```

$ g++ xor_list.cpp
$ a.out
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 1
Enter value to be inserted: 100
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 2
Elements of XOR Linked List: 
100 
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 1
Enter value to be inserted: 200
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 2
Elements of XOR Linked List: 
200 100 
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 1
Enter value to be inserted: 300
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 2
Elements of XOR Linked List: 
300 200 100 
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 1
Enter value to be inserted: 400
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 2
Elements of XOR Linked List: 
400 300 200 100 
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 1
Enter value to be inserted: 500
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 2
Elements of XOR Linked List: 
500 400 300 200 100 
 
-------------
Operations on XOR Linked List
 
-------------
1.Insert Element at First
2.Display List
3.Quit
Enter your Choice: 3
 
 
------------------
(program exited with code: 1)
Press return to continue

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