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  1. #include <stdio.h>
  2.  
  3. struct entry
  4. {
  5. 	int value;
  6. 	struct entry * next;
  7. };
  8.  
  9. int main()
  10. {
  11. 	void insertEntry(struct entry * list_pointer, struct entry * prev);
  12. 	struct entry *list_pointer, *prev;
  13. 	struct entry n1, n2, n3, n4;
  14. 	n1.value = 100;
  15. 	n1.next = &n2;
  16. 	n2.value = 200;
  17. 	n2.next = &n3;
  18. 	n3.value = 300;
  19. 	n3.next = &n4;
  20. 	n4.value = 400;
  21. 	n4.next = (struct entry *) 0;
  22. 	list_pointer = &n1;
  23. 	prev = &n2;
  24.  
  25. 	printf("Before: \n");
  26.  
  27. 	while (list_pointer != (struct entry *) 0) {
  28. 		printf("%i \n", list_pointer->value);
  29. 		list_pointer = list_pointer->next;
  30. 	}
  31. 	insertEntry(list_pointer, prev);
  32. 	printf("After: \n");
  33. 	list_pointer = &n1;
  34. 	while (list_pointer != (struct entry *) 0) {
  35. 		printf("%i\n", list_pointer->value);
  36. 		list_pointer = list_pointer->next;
  37. 	}
  38. 	return 0;
  39. }
  40.  
  41. void insertEntry(struct entry * list_pointer, struct entry * prev)
  42. {
  43. 	struct entry newEntry;
  44. 	newEntry.value = 555;
  45. 	printf("TEST 1\n");
  46. 	while (list_pointer != (struct entry *) 0) {
  47.  
  48. 		if (list_pointer == prev) {
  49. 			printf("TEST 2\n");
  50. 			newEntry.next = list_pointer;
  51. 			list_pointer->next = &newEntry;
  52. 		}
  53. 		else
  54. 			list_pointer = list_pointer->next;
  55. 		printf("TEST 3\n");
  56. 	}
  57. }
  58.  
Success #stdin #stdout 0s 2168KB
comments (?)
stdin
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Standard input is empty
stdout
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Before: 
100 
200 
300 
400 
TEST 1
After: 
100
200
300
400
https://ideone.com/FH1jwK
language:
C99 (gcc 8.3)
created:
7 years ago
visibility:
secret

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