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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3.  
  4. struct Node {
  5.     int data;
  6.     struct Node *next;
  7. };
  8.  
  9. struct Node *createLinkedList(int arr[], int size);
  10. void print(struct Node *head);
  11. void insert(struct Node *head, int pos, int value);
  12.  
  13. int main() {
  14.     int a[] = {15, 30, 45, 60, 100};
  15.     struct Node *head = NULL;
  16.     head = createLinkedList(a, 5);
  17.     print(head);
  18.     insert(head, 1, 555);
  19.     print(head);
  20.     return 0;
  21. }
  22.  
  23. void insert(struct Node *head, int pos, int value) {
  24.     struct Node *temp = head;
  25.     int count = 0;
  26.     while (temp != NULL) {
  27.         count++;
  28.         if (count == pos) {
  29.             struct Node *newnode = (struct Node*)malloc(sizeof(struct Node));
  30.             newnode->data = value;
  31.             newnode->next = temp->next;
  32.             temp->next = newnode;
  33.             return;
  34.         }
  35.         temp = temp->next;
  36.     }
  37. }
  38.  
  39. void print(struct Node *head) {
  40.     struct Node *temp = head;
  41.     while (temp != NULL) {
  42.         printf("%d ", temp->data);
  43.         temp = temp->next;
  44.     }
  45.     printf("\n");
  46. }
  47.  
  48. struct Node *createLinkedList(int arr[], int size) {
  49.     struct Node *head = NULL;
  50.     struct Node *temp = NULL;
  51.     struct Node *current = NULL;
  52.     int i;
  53.     for (i = 0; i < size; i++) {
  54.         temp = (struct Node*)malloc(sizeof(struct Node));
  55.         temp->data = arr[i];
  56.         temp->next = NULL;
  57.         if (head == NULL) {
  58.             head = temp;
  59.             current = temp;
  60.         } else {
  61.             current->next = temp;
  62.             current = current->next;
  63.         }
  64.     }
  65.     return head;
  66. }
  67.  
Success #stdin #stdout 0.01s 5280KB
comments (?)
stdin 
Standard input is empty
stdout 
15 30 45 60 100 
15 555 30 45 60 100
https://ideone.com/5nxRta
language:
C++ (gcc 8.3)
created:
19 days ago
visibility:
public

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