fork(2) download
  1. /*
  2. Azhary Arliansyah
  3. Teknik Informatika
  4. Universitas Sriwijaya
  5. arliansyahazhary.blogspot.com
  6. */
  7.  
  8. #include <stdio.h>
  9. #include <stdlib.h> // agar dapat menggunakan malloc() dan free()
  10. #include <stdbool.h> // agar dapat menggunakan tipe data boolean
  11.  
  12. typedef struct node
  13. {
  14. // field untuk menyimpan integer
  15. int n;
  16.  
  17. // pointer ke elemen selanjutnya
  18. struct node* next;
  19. } node;
  20.  
  21. // elemen pertama pada linked list
  22. node* head = NULL;
  23.  
  24. bool insert(node* list, int value)
  25. {
  26. // inisialisasi node baru
  27. node* new_node = malloc(sizeof(node));
  28.  
  29. if (new_node == NULL)
  30. {
  31. // alokasi memori gagal
  32. return false;
  33. }
  34.  
  35. // inisialisasi nilai pada node yang baru
  36. new_node->n = value;
  37. new_node->next = NULL;
  38.  
  39. // deklarasi node pembantu
  40. node* current = list;
  41. node* previous = NULL;
  42.  
  43. // jika list kosong
  44. if (current == NULL)
  45. {
  46. head = new_node;
  47. new_node->next = NULL;
  48. return true;
  49. }
  50.  
  51. // pointer pembantu akan mengecek elemen satu per satu sampai ujung list
  52. while (current != NULL)
  53. {
  54. // memasukkan elemen baru pada awal atau tengah list
  55. if (current->n > value)
  56. {
  57. // pointer node baru menunjuk pada elemen selanjutnya(elemen yang ditunjuk pointer pembantu)
  58. new_node->next = current;
  59.  
  60. // jika hanya ada satu elemen pada list
  61. if (previous == NULL)
  62. {
  63. head = new_node;
  64. }
  65. // jika ingin memasukkan elemen baru di tengah list
  66. else
  67. {
  68. // ubah pointer pada elemen sebelumnya untuk menunjuk node baru
  69. previous->next = new_node;
  70. }
  71.  
  72. // node baru berhasil dimasukkan
  73. return true;
  74. }
  75. // memasukkan elemen baru pada ujung list
  76. else if (current->n < value)
  77. {
  78. // pointer pembantu
  79. previous = current;
  80. // pointer pembantu pergi ke elemen selanjutnya
  81. current = current->next;
  82.  
  83. // jika pointer pembantu sampai di ujung list
  84. if (current == NULL)
  85. {
  86. // pointer sebelumnya menunjuk ke node baru
  87. previous->next = new_node;
  88. return true;
  89. }
  90. }
  91. // jika elemen yang ingin dimasukkan telah ada sebelumnya, maka Node baru di-delete
  92. else if (current->n == value)
  93. {
  94. free(new_node);
  95. return false;
  96. }
  97. }
  98.  
  99. // gagal memasukkan elemen baru
  100. return false;
  101. }
  102.  
  103. bool delete(node* list, int value)
  104. {
  105. // deklarasi pointer pembantu
  106. node* current = list;
  107. node* previous = NULL;
  108.  
  109. // pointer pembantu akan mengecek elemen satu per satu sampai ujung list
  110. while (current != NULL)
  111. {
  112. // jika elemen yang ingin dihapus ditemukan
  113. if (current->n == value)
  114. {
  115. // jika hanya terdapat satu elemen pada list
  116. if (previous == NULL)
  117. {
  118. // hapus, membebaskan memorinya dengan free
  119. free(head);
  120.  
  121. // list kosong
  122. head = current->next;
  123. }
  124. // jika elemen yang ingin dihapus terdapat di tengah list
  125. else
  126. {
  127. // pointer sebelumnya menunjuk ke elemen yang ditunjuk oleh elemen setelahnya
  128. previous->next = current->next;
  129.  
  130. // hapus, membebaskan memorinya dengan free
  131. free(current);
  132. }
  133.  
  134. // elemen berhasil dihapus
  135. return true;
  136. }
  137. else
  138. {
  139. // pointer pembantu pergi ke elemen selanjutnya
  140. previous = current;
  141. current = current->next;
  142. }
  143. }
  144.  
  145. // elemen gagal dhapus
  146. return false;
  147. }
  148.  
  149. bool search(node* list, int value)
  150. {
  151. // pointer pembantu start dari elemen pertama(list)
  152. node* current = list;
  153.  
  154. // pointer pembantu akan melewati elemen pada linked list sampai ujung(NULL)
  155. while (current != NULL)
  156. {
  157. // nilai pada elemen yang ditunjuk pointer pembantu sama dengan nilai yang dicari
  158. if (current->n == value)
  159. {
  160. // ketemu
  161. return true;
  162. }
  163. else
  164. {
  165. // pergi ke elemen selanjutnya
  166. current = current->next;
  167. }
  168. }
  169.  
  170. // pointer pembantu telah sampai di ujung list, berarti tidak ketemu
  171. return false;
  172. }
  173.  
  174. void print(node* list)
  175. {
  176. node* current = list;
  177. while (current != NULL)
  178. {
  179. printf("%d -> ", current->n);
  180. current = current->next;
  181. }
  182. printf("NULL\n");
  183. }
  184.  
  185. void free_node(node* list)
  186. {
  187. node* current = list;
  188. while (current != NULL)
  189. {
  190. free(current);
  191. current = current->next;
  192. }
  193. }
  194.  
  195. int main()
  196. {
  197. int value;
  198. int option;
  199.  
  200. while (true)
  201. {
  202. printf("1. Insert\n2. Display\n3. Search\n4. Delete\n0. Quit\n(~): ");
  203. scanf("%d", &option);
  204. switch (option)
  205. {
  206. case 1:
  207. printf("Insert value: ");
  208. scanf("%d", &value);
  209. printf("Insertion %s\n", (insert(head, value)) ?
  210. "berhasil" : "tidak berhasil");
  211. break;
  212. case 2: print(head); break;
  213. case 3:
  214. printf("Angka yang dicari: ");
  215. scanf("%d", &value);
  216. printf("Elemen yang dicari %s\n", (search(head, value)) ?
  217. "ketemu" : "tidak ketemu");
  218. break;
  219. case 4:
  220. printf("Angka yang ingin dihapus: ");
  221. scanf("%d", &value);
  222. printf("Deletion %s\n", (delete(head, value)) ?
  223. "berhasil" : "tidak berhasil");
  224. break;
  225. case 0:
  226. free_node(head);
  227. return 0;
  228. break;
  229. }
  230. }
  231. }
Runtime error #stdin #stdout 0s 2056KB
stdin
Standard input is empty
stdout
1. Insert
2. Display
3. Search
4. Delete
0. Quit
(~): 1. Insert
2. Display
3. Search
4. Delete
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2. Display
3. Search
4. Delete
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3. Search
4. Delete
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4. Delete
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3. Search
4. Delete
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2. Display
3. Search
4. Delete
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4. Delete
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3. Search
4. Delete
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2. Display
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4. Delete
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