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  1.  
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6. class Node
  7. {
  8. public :
  9. 	int data;
  10. 	Node* next;
  11.  
  12. 	Node() { next = NULL; }
  13. 	Node(int d) { data = d; next = NULL; }
  14. };
  15.  
  16. class LinkList
  17. {
  18. private :
  19. 	Node* first;
  20. 	Node* last;
  21. 	int size;
  22.  
  23. public :
  24. 	LinkList() { first = last = NULL , size = 0; }
  25.  
  26.  
  27. 	// baraye tamame tavabe dar surati ke betunin kar khaste shode ro anjam bedin true bargardunin
  28. 	// dar gheyre in surat false bargardunid
  29.  
  30. 	bool AddFirst(int x)
  31. 	{
  32. 		// node jadid ba meghdare x ro be ebtedaye link ezafe konid
  33. 		Node* t = new Node(x);
  34.  
  35. 		if (first == NULL)
  36. 			first = last = t;
  37. 		else
  38. 		{
  39. 			t->next = first;
  40. 			first = t;
  41. 		}
  42. 		size++;
  43.  
  44. 		return true;
  45. 	}
  46.  
  47. 	bool AddLast(int x)
  48. 	{
  49. 		// ... enteha ...
  50. 		Node* t = new Node(x);
  51.  
  52. 		if (first == NULL)
  53. 			first = last = t;
  54. 		else
  55. 		{
  56. 			last->next = t;
  57. 			last = t;
  58. 		}
  59. 		size++;
  60.  
  61. 		return true;
  62. 	}
  63.  
  64. 	bool AddMiddle(int x , int pos)
  65. 	{
  66. 		// node jadid ro ruye andise pos garar bedin , yani :
  67. 		// 		-> pos==0 : be avvale list ezafe konid
  68. 		//		-> pos==size : be entehaye list ezafe konid
  69. 		//		-> pos>0 && pos<size : node jadid ro ghabl az node x'th garar bedin ta andisesh mosaviye x beshe
  70. 		//				mesal : 7 -> 3 -> 6 -> 1
  71. 		//						add(5,2)
  72. 		//						7 -> 3 -> 5 -> 6 -> 1
  73. 		//		-> else : andis na motabare va bayad false bargardunid;
  74.  
  75. 		if (pos<0 || pos>size) return false;
  76.  
  77. 		if (pos==0) return AddFirst(x);
  78. 		if (pos==size) return AddLast(x);
  79.  
  80. 		Node* help = first;
  81. 		for (int i=0 ; i<pos-1 ; i++) 
  82. 			help = help->next;
  83.  
  84. 		Node* t = new Node(x);
  85. 		t->next = help->next;
  86. 		help->next = t;
  87. 		size++;
  88.  
  89. 		return true;
  90. 	}
  91.  
  92.  
  93. 	// baraye delete ha 
  94. 	//		age emkane delete kardan vujud dashte bashe -> meghdare delete shode ro be komake x be karbar ettela bedid va true resturn konid
  95. 	//		dar gheyre insurat false bargardunid
  96. 	//		be onovane mesal be tabe zir nega konid
  97.  
  98. 	bool DeleteFirst(int& x)
  99. 	{
  100. 		// Hazfe ozve avval
  101. 		if (first == NULL) return false;
  102.  
  103. 		Node* t = first;					// copy az first baraye delete kardan
  104. 		if (first == last) last = NULL;
  105. 		first = first->next;
  106.  
  107. 		x = t->data;						// zakhireye meghdare dakhele in node
  108. 		delete t;							// delete kardane hafezeye gerefte shode
  109. 		size--;
  110.  
  111. 		return true;
  112. 	}
  113.  
  114. 	bool DeleteLast(int& x)
  115. 	{
  116. 		// Hazve ozve akhar
  117.  
  118. 		if (first == NULL) return false;
  119.  
  120. 		x = last->data;
  121. 		if (first == last)
  122. 		{
  123. 			delete first;
  124. 			first = last = NULL;
  125. 		}
  126. 		else
  127. 		{
  128. 			Node* help = first;
  129. 			while ( help->next != last )
  130. 				help = help->next;
  131.  
  132. 			delete last;
  133. 			last = help;
  134. 			last->next = NULL;
  135. 		}
  136.  
  137. 		size--;
  138. 		return true;
  139. 	}
  140.  
  141. 	bool DeleteMiddle(int& x, int pos)
  142. 	{
  143. 		// Hazfe ozve pos'th , andisha az sefr shuru mishan yani [0 .. size-1]
  144. 		return true;
  145. 	}
  146.  
  147.  
  148. 	bool GetFirst(int& x) { return true; } 
  149. 	bool GetLast(int& x) { return true; }
  150. 	bool GetMiddle(int&x , int pos) { return true; }
  151.  
  152. 	int Size() { return size; }
  153.  
  154. 	void Print() 
  155. 	{
  156. 		cout<<"Size = "<<size<<" : ";
  157.  
  158. 		Node* help = first;
  159. 		while (help!=NULL)
  160. 		{
  161. 			cout<<help->data<<" ";
  162. 			help = help->next;
  163. 		}
  164. 		cout<<"\n";
  165. 	}
  166.  
  167. 	void Clean()
  168. 	{
  169. 		// azaye link list ro kamel pak konid
  170. 	}
  171.  
  172. 	void Reverse()
  173. 	{
  174. 		// link list ro makus konid
  175. 	}
  176.  
  177.  
  178.  
  179.  
  180.  
  181. 	// ---------------------------------------------------------------- Ekhtiyari ha --------------------------------------------------------------
  182.  
  183. 	void Sort_n2()		{}
  184. 	void Sort_nlogn()	{}
  185. 	void Unique()		{}				// hazfe tekrari ha
  186. 	LinkList Merge(LinkList l)	 		// tarkibe 2 link liste morattab shode
  187. 	{
  188. 		LinkList ans;
  189. 		// ...
  190. 		return ans;
  191. 	}
  192. };
  193.  
  194. int main()
  195. {
  196. 	int x;
  197. 	LinkList l;
  198.  
  199. 	l.AddFirst(3);
  200. 	l.AddFirst(5);
  201. 	l.AddFirst(7);
  202. 	l.AddLast(10);
  203. 	l.Print();
  204.  
  205. 	l.DeleteFirst(x);
  206. 	l.DeleteLast(x);
  207. 	l.DeleteFirst(x);
  208. 	l.Print();
  209.  
  210. 	l.DeleteFirst(x);
  211. 	l.DeleteFirst(x);
  212. 	l.DeleteFirst(x);
  213. 	l.DeleteFirst(x);
  214. 	l.Print();
  215.  
  216. 	l.AddFirst(8);
  217. 	l.AddLast(10);
  218. 	l.AddMiddle(11 , 1);
  219. 	l.AddMiddle(12 , 1);
  220. 	l.AddMiddle(13 , 3);
  221. 	l.Print();
  222.  
  223. 	return 0;
  224. }
Success #stdin #stdout 0s 3412KB
comments (?)
stdin 
Standard input is empty
stdout 
Size = 4 : 7 5 3 10 
Size = 1 : 3 
Size = 0 : 
Size = 5 : 8 12 11 13 10
https://ideone.com/O2CijC
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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