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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. struct list {
  5.     int key;
  6.     struct list *prev, *next;
  7. };
  8.  
  9. struct list *append(struct list **l, int k)
  10. {
  11.     *l = malloc(sizeof *l);
  12.     (*l)->key = k;
  13.     (*l)->next = NULL;
  14.     return *l;
  15. }
  16.  
  17. void print(struct list *node)
  18. {
  19. 	while(node)
  20. 	{
  21. 		printf("%d\n", node->key);
  22. 		node = node->next;
  23. 	}
  24. }
  25.  
  26. int main(void)
  27. {
  28.     struct list *l, *head;
  29.     int i;
  30.  
  31.     head = append(&l, -1);
  32.     for (i = 0; i < 42; ++i)
  33.         l = append(&l, i);	
  34.  
  35.     print(head);
  36. }
  37.  
Success #stdin #stdout 0.01s 1852KB
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Standard input is empty
stdout
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-1
https://ideone.com/utht8
language:
C99 (gcc 8.3)
created:
14 years ago
visibility:
public

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