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  1. #include<stdio.h>
  2. #include<stdlib.h>
  3.  
  4. struct tree
  5. {
  6.     struct tree *left;
  7.     struct tree *right;
  8.     int value;
  9. };
  10.  
  11. typedef struct tree node;
  12.  
  13. void insertNode(node **root, int val)
  14. {
  15.     node *temp = NULL;
  16.     if(!(*root))
  17.     {
  18.         temp = (node*) malloc(sizeof(node));
  19.         temp->value = val;
  20.         temp->left = NULL;
  21.         temp->right = NULL;
  22.         *root = temp;
  23.     }
  24.  
  25.     if(val < (*root)->value)
  26.         insertNode(&(*root)->left, val);
  27.  
  28.     if(val >= (*root)->value)
  29.         insertNode(&(*root)->right, val);
  30. }
  31.  
  32. void preOrder(node *root)
  33. {
  34.     if(root)
  35.     {   printf(" %d",root->value);
  36.         preOrder(root->left);
  37.         preOrder(root->right);
  38.     }
  39. }
  40.  
  41. void inOrder(node *root)
  42. {
  43.     if(root)
  44.     {
  45.         inOrder(root->left);
  46.         printf(" %d",root->value);
  47.         inOrder(root->right);
  48.     }
  49. }
  50.  
  51. void postOrder(node *root)
  52. {
  53.     if(root)
  54.     {
  55.         postOrder(root->left);
  56.         postOrder(root->right);
  57.         printf(" %d",root->value);
  58.     }
  59. }
  60.  
  61. void delTree(node *root)
  62. {
  63.     if(root)
  64.     {
  65.         delTree(root->left);
  66.         delTree(root->right);
  67.         free(root);
  68.     }
  69. }
  70.  
  71. int main()
  72. {
  73.     int val;
  74.     char ch; ch = 'y';
  75.     node *root;
  76.  
  77.     while(ch == 'y')
  78.     {
  79.         scanf("Enter the node value: %d", &val);
  80.         insertNode(&root, val);
  81.         scanf("Want to enter more: %c", &ch);
  82.     }
  83.  
  84.     printf("\nInOrder traversal:\n");
  85.     inOrder(root);
  86.     printf("\nPreOrder traversal:\n");
  87.     preOrder(root);
  88.     printf("\nPostOrder traversal:\n");
  89.     postOrder(root);
  90.  
  91.     delTree(root);
  92.     printf("Tree Deleted.");
  93.  
  94.     return 0;
  95. }
  96.  
Runtime error #stdin #stdout 0s 2292KB
comments (?)
stdin 
2
y
5
y
3
y
7
y
1
y
0
y
3
n
stdout 
Standard output is empty
https://ideone.com/jOnjEK
language:
C (gcc 8.3)
created:
10 years ago
visibility:
public

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