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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <string.h>
  4.  
  5. // Structure definitions
  6. // Node in doubly-linked list
  7.  
  8. typedef struct DLN {
  9.     struct DLN *prev;       // Pointer to previous list element
  10.     struct DLN *next;       // Pointer to next list element
  11.     char *word;
  12. } DLNode;
  13.  
  14. // Actual doubly-linked list
  15. typedef struct {
  16.     DLNode *firstNode;  // Pointer to first node in list
  17.     DLNode *lastNode;   // Pointer to last node in list
  18. } DLList;
  19.  
  20. // Function prototypes
  21.  
  22. void addNode(DLList *list, const char *str) {
  23.     DLNode *newNode = (DLNode*)malloc(sizeof(DLNode));
  24.  
  25.     if (newNode == NULL) {
  26.         fprintf(stderr, "Error:Could not allocate new node\n");
  27.         exit(0);
  28.     }
  29.  
  30.     //list is empty, add one node 
  31.     if ((list->firstNode == NULL) && (list->lastNode == NULL)) {
  32.         list->firstNode = newNode;
  33.         list->lastNode = newNode;
  34.         newNode->next=NULL;
  35.         newNode->prev=NULL;
  36.  
  37.         newNode->word = (char*)malloc(strlen(str) + 1);
  38.  
  39.         if (newNode->word == NULL) {
  40.             fprintf(stderr, "Error:Could not allocate new string for node\n");
  41.             exit(0);
  42.         }
  43.  
  44.         strcpy(newNode->word, str); // newNode->word is large enough, so this is safe.
  45.     }
  46. }
  47.  
  48. int main(void) {
  49. 	DLList list = { NULL, NULL };
  50. 	addNode(&list, "Worddhfkjsdfhaskjlfhadskjfl");
  51. 	puts(list.firstNode->word);
  52. }
  53.  
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
Worddhfkjsdfhaskjlfhadskjfl
https://ideone.com/kt2PYF
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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