please go in to the detail and explain the purpose and function to each line & function of code listed below. #include //Represent a node of the singly linked list struct node{ int data; struct node *next; }; //Represent the head and tail of the singly linked list struct node *head, *tail = NULL; //addNode() will add a new node to the list void addNode(int data) { //Create a new node struct node *newNode = (struct node*)malloc(sizeof(struct node)); newNode->data = data; newNode->next = NULL; //Checks if the list is empty if(head == NULL) { //If list is empty, both head and tail will point to new node head = newNode; tail = newNode; } else { //newNode will be added after tail such that tail's next will point to newNode tail->next = newNode; //newNode will become new tail of the list tail = newNode; } } //removeDuplicate() will remove duplicate nodes from the list void removeDuplicate() { //Node current will point to head struct node *current = head, *index = NULL, *temp = NULL; if(head == NULL) { return; } else { while(current != NULL){ //Node temp will point to previous node to index. temp = current; //Index will point to node next to current index = current->next; while(index != NULL) { //If current node's data is equal to index node's data if(current->data == index->data) { //Here, index node is pointing to the node which is duplicate of current node //Skips the duplicate node by pointing to next node temp->next = index->next; } else { //Temp will point to previous node of index. temp = index; } index = index->next; } current = current->next; } } } //display() will display all the nodes present in the list void display() { //Node current will point to head struct node *current = head; if(head == NULL) { printf("List is empty \n"); return; } while(current != NULL) { //Prints each node by incrementing pointer printf("%d ", current->data); current = current->next; } printf("\n"); } int main() { //Adds data to the list addNode(1); addNode(2); addNode(3); addNode(2); addNode(2); addNode(4); addNode(1); printf("Originals list: \n"); display(); //Removes duplicate nodes removeDuplicate(); printf("List after removing duplicates: \n"); display(); return 0; }
please go in to the detail and explain the purpose and function to each line & function of code listed below.
#include <stdio.h>
//Represent a node of the singly linked list
struct node{
int data;
struct node *next;
};
//Represent the head and tail of the singly linked list
struct node *head, *tail = NULL;
//addNode() will add a new node to the list
void addNode(int data) {
//Create a new node
struct node *newNode = (struct node*)malloc(sizeof(struct node));
newNode->data = data;
newNode->next = NULL;
//Checks if the list is empty
if(head == NULL) {
//If list is empty, both head and tail will point to new node
head = newNode;
tail = newNode;
}
else {
//newNode will be added after tail such that tail's next will point to newNode
tail->next = newNode;
//newNode will become new tail of the list
tail = newNode;
}
}
//removeDuplicate() will remove duplicate nodes from the list
void removeDuplicate() {
//Node current will point to head
struct node *current = head, *index = NULL, *temp = NULL;
if(head == NULL) {
return;
}
else {
while(current != NULL){
//Node temp will point to previous node to index.
temp = current;
//Index will point to node next to current
index = current->next;
while(index != NULL) {
//If current node's data is equal to index node's data
if(current->data == index->data) {
//Here, index node is pointing to the node which is duplicate of current node
//Skips the duplicate node by pointing to next node
temp->next = index->next;
}
else {
//Temp will point to previous node of index.
temp = index;
}
index = index->next;
}
current = current->next;
}
}
}
//display() will display all the nodes present in the list
void display() {
//Node current will point to head
struct node *current = head;
if(head == NULL) {
printf("List is empty \n");
return;
}
while(current != NULL) {
//Prints each node by incrementing pointer
printf("%d ", current->data);
current = current->next;
}
printf("\n");
}
int main()
{
//Adds data to the list
addNode(1);
addNode(2);
addNode(3);
addNode(2);
addNode(2);
addNode(4);
addNode(1);
printf("Originals list: \n");
display();
//Removes duplicate nodes
removeDuplicate();
printf("List after removing duplicates: \n");
display();
return 0;
}
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