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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3.  
  4. struct link{
  5. 	int data;
  6. 	struct link *next;
  7. };
  8.  
  9. struct list{
  10. 	struct link *head;
  11. 	struct link *tail;
  12. };
  13.  
  14. struct link * add_tail(struct list *lst, int value){
  15. 	struct link *item = (struct link *)malloc(sizeof(struct link));
  16. 	item->data = value;
  17. 	item->next = NULL;
  18. 	if(lst->head == NULL){
  19. 		lst->head = item;
  20. 		lst->tail = lst->head;
  21. 	}else{
  22. 		lst->tail->next = item;
  23. 		lst->tail = item;
  24. 	}
  25. 	return item;
  26. }
  27.  
  28. struct link * insert(struct list *lst, int data){
  29. 	struct link *p, *t;
  30. 	if(lst->head == NULL){
  31. 		p = (struct link *)malloc(sizeof(struct link));
  32. 		p->data = data;
  33. 		p->next = NULL;
  34. 		lst->head = p;
  35. 	}else{
  36. 		p = lst->head;
  37. 		while(p = p->next)
  38. 			;
  39. 		p = (struct link *)malloc(sizeof(struct link));
  40. 		p->data = data;
  41. 		p->next = NULL;
  42. 	}
  43. 	return p;
  44. }
  45.  
  46. void print(struct list *lst){
  47. 	struct link *p = lst->head;
  48. 	while(p){
  49. 		printf("%d\n", p->data);
  50. 		p = p->next;
  51. 	}
  52. }
  53.  
  54. int main(){
  55. 	struct list lst;
  56. 	lst.head = lst.tail = NULL;
  57. 	int in, i;
  58.  
  59. 	for(i = 1; i <= 3; i++){
  60. 		add_tail(&lst, i);
  61. 	}
  62. 	print(&lst);
  63. 	insert(&lst, 5);
  64. 	print(&lst);
  65. }
Success #stdin #stdout 0s 2292KB
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https://ideone.com/Y1p2pP
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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