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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. struct ListNode {
  4.  int val;
  5.  ListNode *next;
  6.  ListNode(int x) : val(x), next(NULL) {}
  7. };
  8.  
  9. void insert(ListNode *&head,int value)
  10. {
  11.     if(!head)
  12.     {
  13.         ListNode *&node = head;
  14.         node = new ListNode(value); //change head using node..
  15.     }
  16.     else
  17.     {
  18.         ListNode *node = head;
  19.  
  20.         while(node->next != NULL)
  21.         {
  22.             node = node->next;
  23.         }
  24.         node->next = new ListNode(value);
  25.     }
  26. }
  27.  
  28. void print(ListNode *head)
  29. {
  30.     ListNode *node = head;
  31.     for(;node!=NULL;){
  32.         printf("%d ",node->val);
  33.         node = node->next;
  34.     }
  35. }
  36. int main(int argc,char *argv[])
  37. {
  38.     ListNode *head = NULL;
  39.     insert(head, 5);
  40.     insert(head, 1);
  41.     insert(head, 2);
  42.     insert(head, 3);
  43.     print(head);
  44.     return 0;
  45. }
  46.  
Success #stdin #stdout 0s 3476KB
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Standard input is empty
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5 1 2 3
https://ideone.com/kw9tWk
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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