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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <time.h>
  4.  
  5. typedef struct tree{
  6. 	int key;
  7. 	struct tree *left;
  8. 	struct tree *right;
  9. } tree;
  10.  
  11. tree * insert(tree *root, int new_value){
  12. 	if(root == NULL){
  13. 		root = (tree *)malloc(sizeof(tree));
  14. 		root->key = new_value;
  15. 		root->left = root->right = NULL;
  16. 		return root;
  17. 	}
  18. 	if(root->key > new_value)
  19. 		root->left  = insert(root->left, new_value);
  20. 	else
  21. 		root->right = insert(root->right, new_value);
  22. }
  23.  
  24. void postorder(tree *root){
  25. 	if(root == NULL)
  26. 		return;
  27. 	postorder(root->left);
  28. 	postorder(root->right);
  29. 	printf("%d ", root->key);
  30. }
  31.  
  32. int main(){
  33. 	int i, k;
  34. 	tree *root = NULL;
  35.  
  36. 	srand(time(NULL));
  37. 	for(i = 0; i < 10; i++){
  38. 		k = rand() % 17;
  39. 		root = insert(root, k);
  40. 	}
  41.  
  42. 	postorder(root);
  43.  
  44. 	scanf("%d", &i);
  45. }
Success #stdin #stdout 0s 3416KB
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stdout 
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https://ideone.com/3Ky6fS
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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