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POTrouble in deleting root node in binary search tree
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copied!<p>I am trying to delete root node from my BST and then printing the tree <strong>inorder</strong>.The root deletion seems to be a problem, all other nodes are getting deleted successfully . </p> <p>Root is 20.</p> <p>inOrderPrint 5 6 7 8 9 10 17 18 20 23 24 25 29 55 56 57 58 59</p> <p>provide a node to delete</p> <p>20</p> <p>after deletion</p> <p><strong>5 6 7 8 9 10 17 18 20</strong> 5 6 7 8 9 10 17 18 23 24 25 29 55 56 57 58 59</p> <p>As you can see after deletion the bintree is not as expected. Bold keys are unwanted. Below is my code</p> <pre><code>void treeDeleteNode (binTreeT **tree, binTreeT *node) { binTreeT *succs; binTreeT *parent; binTreeT *root = *tree; if (node->rchild == NULL) { transplantTree (&root, node, node->lchild); } else if (node->lchild == NULL) { transplantTree (&root, node, node->rchild); } else { succs = treeMin (node->rchild); parent = getParentNode (root, succs); if (parent != node) { transplantTree (&root, succs, succs->rchild); succs->rchild = node->rchild; } transplantTree (&root, node, succs); succs->lchild = node->lchild; } } void transplantTree (binTreeT **root, binTreeT *old, binTreeT *new) { binTreeT *rootRef = *root; binTreeT *parent; parent = getParentNode(rootRef, old); if (NULL == parent) { *root = new; } else { if (parent->lchild == old) { parent->lchild = new; } else { parent->rchild = new; } } } binTreeT* treeMin (binTreeT *tree) { while (tree->lchild != NULL) { tree = tree->lchild; } return tree; } binTreeT* getParentNode(binTreeT *root, binTreeT* node) { binTreeT *parent = NULL; while (root->data != node->data) { parent = root; if (node->data < root->data) { root = root->lchild; } else if(node->data > root->data) { root = root->rchild; } } return parent; } void inOrderPrint (binTreeT *tree) { if (NULL != tree) { inOrderPrint (tree->lchild); printf("%d \t", tree->data); inOrderPrint (tree->rchild); } } </code></pre> <p>..... any help appreciated.....</p>

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