Project 1 - Creation of user defined data type to implement the user interfaces for working with ‘Set’ (Mathematical Set theory) using Linked List

Code:-

#include
#include

// A structure of linked list node
struct node

{
int data;
struct node *next;
} *LLOne, *LLTwo, *unionLL, *intersectionLL;
void initialize()

{
LLOne = LLTwo = NULL;
}
//Given a Inserts a node in front of a singly linked list.
void insert(struct node **head, int num)

{
// Create a new Linked List node
struct node* newNode = (struct node*) malloc(sizeof(struct node));
newNode->data = num;
newNode->next = *head;// Next pointer of new node will point to head node of linked list
*head = newNode;//make new node as new head of linked list
}
// Searches an element in Linked List by linearly traversing from head to tail
int search(struct node *head, int num)
{
while (head != NULL)
{
if (head->data == num)
{
return 1;
}
head = head->next;
}
return 0;
}
//Returns the union of two given linked list
struct node* findunion(struct node *LLOne, struct node *LLTwo)
{
unionLL = NULL;
struct node *temp = LLOne; // Add all nodes of first Linked List to unionLL
while(temp != NULL)
{
insert(&unionLL, temp->data);
temp = temp->next;
}
while(LLTwo != NULL)// Insert those nodes of LLTwo which is not present in LLOne
{
if(!search(LLOne, LLTwo->data))
{
insert(&unionLL, LLTwo->data);
}
LLTwo = LLTwo->next;
}
return unionLL;
}
//Returns the Linked List which contains common nodes of two given linked list
struct node* intersection(struct node *LLOne, struct node *LLTwo)

{
intersectionLL = NULL;
//Search every element of LLOne in LLTwo, If found then add it to intersection List
while(LLOne != NULL)
{
if(search(LLTwo, LLOne->data))
{
insert(&intersectionLL, LLOne->data);
}
LLOne = LLOne->next;
}
return intersectionLL;
}
//Prints a linked list from head node till tail node
void printLinkedList(struct node *nodePtr)
{
while (nodePtr != NULL)
{
printf("%d", nodePtr->data);
nodePtr = nodePtr->next;
if(nodePtr != NULL)
printf("-->");

}
}

int main()

{
int i, LLOneCount, LLTwoCount, temp;
initialize();
//Creating First linked List
printf("Enter number of nodes in first Linked List\n");
scanf("%d", &LLOneCount);
printf("Enter %d integers\n", LLOneCount);
for(i=0; i

{
scanf("%d", &temp);
insert(&LLOne, temp);
}
printLinkedList(LLOne);
printf("\nEnter number of nodes in second Linked List\n");
scanf("%d", &LLTwoCount);
printf("Enter %d integers\n", LLTwoCount);
for(i=0; i

{
scanf("%d", &temp);
insert(&LLTwo, temp);
}
printLinkedList(LLTwo);
//printing Union of two given linked list
findunion(LLOne, LLTwo);
intersection(LLOne, LLTwo);
printf("\nUnion Linked List\n");
printLinkedList(unionLL);
printf("\nIntersection Linked List\n");
printLinkedList(intersectionLL);

return 0;
}