struct node{
int data;
struct node *next;
};
struct node *head, *tail = NULL;
void addNode(int data) {
struct node *newNode = (struct node*)malloc(sizeof(struct node));
newNode->data = data;
newNode->next = NULL;
if(head == NULL) {
head = newNode;
tail = newNode;
}
else {
tail->next = newNode;
tail = newNode;
}
}
void removeDuplicate() {
struct node *current = head, *index = NULL, *temp = NULL;
if(head == NULL) {
return;
}
else {
while(current != NULL){
temp = current;
index = current->next;
while(index != NULL) {
if(current->data == index->data) {
temp->next = index->next;
}
else {
temp = index;
}
index = index->next;
}
current = current->next;
}
}
}
void display() {
struct node *current = head;
if(head == NULL) {
printf("List is empty \n");
return;
}
while(current != NULL) {
printf("%d ", current->data);
current = current->next;
}
printf("\n");
}
struct node* findMiddle(struct node* b, struct node* e)
{
if(b == NULL)
return NULL;
struct node* slow = b;
struct node* fast = b->next;
while(fast != e)
{
fast=fast->next;
if(fast != e)
{
slow = slow->next;
fast = fast->next;
}
}
return slow;
};
struct node* binarysearch(int searchItem)
{
struct node* beg = head;
struct node* end = NULL;
do
{
struct node* middle = findMiddle(beg, end);
if(middle == NULL)
return middle;
else if(middle->data == searchItem)
return middle;
else if(middle->data <>
beg = middle->next;
else
end = middle;
}while(end==NULL || end != beg);
return NULL;
}
int main()
{
addNode(1);
addNode(2);
addNode(3);
addNode(2);
addNode(2);
addNode(4);
addNode(1);
printf("Originals list: \n");
display();
removeDuplicate();
printf("List after removing duplicates: \n");
display();
printf("Search for 3 in the linked list:\n");
struct node* n = binarysearch(3);
if(n==NULL)
{
printf("Item not Found\n");
}
else
{
printf("Item Found\n");
printf("%d\n",n->data);
}
printf("Search for 7 in the linked list:\n");
n = binarysearch(7);
if(n==NULL)
{
printf("Item not Found\n");
}
else
{
printf("Item Found\n");
printf("%d",n->data);
}
return 0;
}