In this program, we are going to share a C program to delete the binary search tree (BST). If you are a beginner and want to start learning the C programming, then keep your close attention in this tutorial as I am going to share a program for C program to delete the binary search tree (BST).
Copy the below C program and execute it with the help of C compiler. At the end of this program, We have shared the output of this program.
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#include<stdio.h> #include<stdlib.h> struct node *newNode(int item) { struct node *temp = (struct node *)malloc(sizeof(struct node)); temp->key = item; temp->left = temp->right = NULL; return temp; } struct node { int key; struct node *left, *right; }; void inorder(struct node *root) { if (root != NULL) { inorder(root->left); printf("%d ", root->key); inorder(root->right); } } struct node* insert(struct node* node, int key) { if (node == NULL) return newNode(key); if (key < node->key) node->left = insert(node->left, key); else node->right = insert(node->right, key); return node; } struct node * minValueNode(struct node* node) { struct node* current = node; while (current->left != NULL) current = current->left; return current; } struct node* deleteNode(struct node* root, int key) { if (root == NULL) return root; if (key < root->key) root->left = deleteNode(root->left, key); else if (key > root->key) root->right = deleteNode(root->right, key); else { if (root->left == NULL) { struct node *temp = root->right; free(root); return temp; } else if (root->right == NULL) { struct node *temp = root->left; free(root); return temp; } struct node* temp = minValueNode(root->right); root->key = temp->key; root->right = deleteNode(root->right, temp->key); } return root; } //main functions int main() { struct node *root = NULL; root = insert(root, 50); root = insert(root, 30); root = insert(root, 20); root = insert(root, 40); root = insert(root, 70); root = insert(root, 60); root = insert(root, 80); printf("Inorder traversal of the given tree \n"); inorder(root); printf("\nDelete 20\n"); root = deleteNode(root, 20); printf("Inorder traversal of the modified tree \n"); inorder(root); printf("\nDelete 30\n"); root = deleteNode(root, 30); printf("Inorder traversal of the modified tree \n"); inorder(root); printf("\nDelete 50\n"); root = deleteNode(root, 50); printf("Inorder traversal of the modified tree \n"); inorder(root); return 0; } |
Inorder traversal of the given tree
20 30 40 50 60 70 80
Delete 20
Inorder traversal of the modified tree
30 40 50 60 70 80
Delete 30
Inorder traversal of the modified tree
40 50 60 70 80
Delete 50
Inorder traversal of the modified tree
40 60 70 80
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