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  1. #include <iostream>
  2. #include <string>
  3. #include <initializer_list>
  4.  
  5. template <class T>
  6. class LinkedList
  7. {
  8. private:
  9. 	struct node
  10. 	{
  11. 		T data;
  12. 		node *next;
  13. 	} *head = nullptr;
  14. public:
  15. 	// Constructors and destructors
  16. 	LinkedList() = default;
  17. 	~LinkedList();
  18. 	LinkedList(const std::initializer_list<T> &il);
  19. 	LinkedList(std::istream &is);
  20.  
  21. 	// Member functions
  22. 	void push (T data);
  23. 	void reverse();
  24. 	std::ostream &print(std::ostream &os);
  25. };
  26.  
  27. template <class T>
  28. LinkedList<T>::~LinkedList()
  29. {
  30. 	node *cur = head, *next = nullptr;
  31. 	while (cur)
  32. 	{
  33. 		next = cur->next;
  34. 		delete cur;
  35. 		cur = next;
  36. 	}
  37. }
  38.  
  39. template <class T>
  40. LinkedList<T>::LinkedList(const std::initializer_list<T> &il)
  41. {
  42. 	for (const auto &data : il)
  43. 		push (data);
  44. }
  45.  
  46. template <class T>
  47. LinkedList<T>::LinkedList(std::istream &is)
  48. {
  49. 	T temp;
  50. 	while (is >> temp)
  51. 		push (temp);
  52. }
  53.  
  54. // Push to head
  55. template <class T>
  56. void LinkedList<T>::push (T data)
  57. {
  58. 	node *elem = new node;
  59. 	elem->data = data;
  60. 	elem->next = head;
  61. 	head = elem;
  62. }
  63.  
  64. template <class T>
  65. void LinkedList<T>::reverse()
  66. {
  67. 	node *prev = nullptr;
  68. 	node *next = nullptr;
  69. 	if (!head) return;
  70. 	while (head->next)
  71. 	{
  72. 		next = head->next;
  73. 		head->next = prev;
  74. 		prev = head;
  75. 		head = next;
  76. 	}
  77. 	head->next = prev;
  78. }
  79.  
  80. template <class T>
  81. std::ostream& LinkedList<T>::print(std::ostream &os)
  82. {
  83. 	node *iter = head;
  84. 	while (iter)
  85. 	{
  86. 		os << iter->data << " ";
  87. 		iter = iter->next;
  88. 	}
  89. 	return os;
  90. }
  91.  
  92.  
  93. int main()
  94. {
  95. 	// Integers
  96. 	LinkedList<int> list({1, 2, 3, 4, 5});
  97. 	list.print(std::cout) << std::endl;
  98. 	list.reverse();
  99. 	list.print(std::cout) << std::endl;
  100.  
  101. 	// Strings
  102. 	LinkedList<std::string> s(std::cin);
  103. 	s.print(std::cout) << std::endl;
  104. 	s.reverse();
  105. 	s.print(std::cout) << std::endl;
  106. }
Success #stdin #stdout 0s 3468KB
comments (?)
stdin
copy 
aaa bbb ccc ddd eee
stdout
copy 
5 4 3 2 1 
1 2 3 4 5 
eee ddd ccc bbb aaa 
aaa bbb ccc ddd eee
https://ideone.com/z6ohEn
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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