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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, 2, 555);
  19.     insert(head,3,56);
  20. insert(head,0,97);
  21.     print(head);
  22.     return 0;
  23. }
  24.  
  25. void insert(struct Node *head, int pos, int value) {
  26.     struct Node *temp = head;
  27.     int count = 0;
  28.     while (temp != NULL) {
  29.         count++;
  30.         if (count == pos) {
  31.             struct Node *newnode = (struct Node*)malloc(sizeof(struct Node));
  32.             newnode->data = value;
  33.             newnode->next = temp->next;
  34.             temp->next = newnode;
  35.             return;
  36.         }
  37.         temp = temp->next;
  38.     }
  39. }
  40.  
  41. void print(struct Node *head) {
  42.     struct Node *temp = head;
  43.     while (temp != NULL) {
  44.         printf("%d ", temp->data);
  45.         temp = temp->next;
  46.     }
  47.     printf("\n");
  48. }
  49.  
  50. struct Node *createLinkedList(int arr[], int size) {
  51.     struct Node *head = NULL;
  52.     struct Node *temp = NULL;
  53.     struct Node *current = NULL;
  54.     int i;
  55.     for (i = 0; i < size; i++) {
  56.         temp = (struct Node*)malloc(sizeof(struct Node));
  57.         temp->data = arr[i];
  58.         temp->next = NULL;
  59.         if (head == NULL) {
  60.             head = temp;
  61.             current = temp;
  62.         } else {
  63.             current->next = temp;
  64.             current = current->next;
  65.         }
  66.     }
  67.     return head;
  68. }
  69.  
Success #stdin #stdout 0s 5304KB
comments (?)
stdin
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Standard input is empty
stdout
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15 30 45 60 100 
15 30 555 56 45 60 100
https://ideone.com/NV5yG8
language:
C++ (gcc 8.3)
created:
23 days ago
visibility:
public

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