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

#include <stdbool.h>//library for boolean operation of boolean data type
#include <stdio.h>//standard i/o header file
#include <stdlib.h>//The stdlib.h header defines four variable types,

/* Link list node */
struct Node {
int data;
struct Node* next;

};

/* function to insert a
node at the beginning of a linked list*/
void push(struct Node** head_ref, int new_data);

/* function to check if
given data is present in a list */
bool isPresent(struct Node* head, int data);

// Function to get union of two linked lists head1 and head2
struct Node* getUnion(
struct Node* head1,
struct Node* head2)
{
struct Node* result = NULL;
struct Node *t1 = head1, *t2 = head2;

// Insert all elements of
// list1 to the result list
while (t1 != NULL) {
push(&result, t1->data);
t1 = t1->next;
}

// Insert those elements of list2
// which are not present in result list
while (t2 != NULL) {
if (!isPresent(result, t2->data))
push(&result, t2->data);
t2 = t2->next;
}

return result;
}

/* Function to get intersection of
two linked lists head1 and head2 */
struct Node* getIntersection(struct Node* head1,
struct Node* head2)
{
struct Node* result = NULL;
struct Node* t1 = head1;

// Traverse list1 and search each element of it in
// list2. If the element is present in list 2, then
// insert the element to result
while (t1 != NULL) {
if (isPresent(head2, t1->data))
push(&result, t1->data);
t1 = t1->next;
}

return result;
}

/* A utility function to insert a
node at the beginning of a linked list*/
void push(struct Node** head_ref, int new_data)
{
/* allocate node */
struct Node* new_node
= (struct Node*)malloc(sizeof(struct Node));

/* put in the data */
new_node->data = new_data;

/* link the old list off the new node */
new_node->next = (*head_ref);

/* move the head to point to the new node */
(*head_ref) = new_node;
}

/* A utility function to print a linked list*/
void printList(struct Node* node)
{
while (node != NULL) {
printf("%d ", node->data);
node = node->next;
}
}

/* A utility function that returns true if data is
present in linked list else return false */
bool isPresent(struct Node* head, int data)
{
struct Node* t = head;
while (t != NULL) {
if (t->data == data)
return 1;
t = t->next;
}
return 0;
}

/* program to run above function*/
int main()
{
int a,b,c,d,e,v,w,x,y,z;
/* Start with the empty list */
struct Node* head1 = NULL;
struct Node* head2 = NULL;
struct Node* intersecn = NULL;
struct Node* unin = NULL;

printf("Enter the 5 elements for the 1st linked list");
//Asking the elements
fflush(stdout);
//input the elements by the user
scanf("\n%d",&a);
scanf("\n%d",&b);
scanf("\n%d",&c);
scanf("\n%d",&d);
scanf("\n%d",&e);

printf("Enter the 5 elements for the 2nd linked list");
//Asking the elements
fflush(stdout);
//input the elements by the user
scanf("\n%d",&v);
scanf("\n%d",&w);
scanf("\n%d",&x);
scanf("\n%d",&y);
scanf("\n%d",&z);
/*create a linked lists with the input data */
push(&head1, a);
push(&head1, b);
push(&head1, c);
push(&head1, d);
push(&head1, e);

/*create a linked lists with the input data*/
push(&head2, v);
push(&head2, w);
push(&head2, x);
push(&head2, y);
push(&head2, z);

intersecn = getIntersection(head1, head2);
unin = getUnion(head1, head2);

printf("\n First list is \n");
printList(head1);

printf("\n Second list is \n");
printList(head2);

printf("\n Intersection list is \n");
printList(intersecn);

printf("\n Union list is \n");
printList(unin);

return 0;
}