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  1. #include <iostream>
  2.  
  3. struct Node
  4. {
  5. 	int data;
  6. 	Node *next;
  7. };
  8.  
  9. Node* push(Node *head, const int i)
  10. {
  11. 	Node *elem = new Node;
  12. 	elem->data = i;
  13.  
  14. 	if (!head)
  15. 		elem->next = nullptr;
  16. 	else
  17. 		elem->next = head;
  18. 	return elem;
  19. }
  20.  
  21. void print(Node *head)
  22. {
  23. 	while (head)
  24. 	{
  25. 		std::cout << head->data << " ";
  26. 		head = head->next;
  27. 	}
  28. }
  29.  
  30. Node* reverse(Node *head)
  31. {
  32.     if(head == nullptr)
  33.         return nullptr;
  34.     Node *prev = nullptr;
  35.     while(head->next != nullptr)
  36.     {
  37.         Node *next = head->next;
  38.         head->next = prev;
  39.         prev = head;
  40.         head = next;
  41.     }
  42.     head->next = prev;
  43.     return head;
  44. }
  45.  
  46. int main() {
  47. 	Node *list = nullptr;
  48. 	for (int i = 0; i < 4; ++i)
  49. 		list = push (list, i);
  50.  
  51. 	print (list);
  52. 	std::cout << std::endl;
  53. 	list = reverse (list);
  54. 	print (list);
  55. 	return 0;
  56. }
Success #stdin #stdout 0s 3460KB
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stdin
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Standard input is empty
stdout
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3 2 1 0 
0 1 2 3
https://ideone.com/Cl9LQO
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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