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POC++ Binary Search Tree error with deleting nodes
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copied!<p>I'm working with deleting nodes from a binary search tree and I keep getting a segfault error after the while loop in this function. Please help me catch any errors if you can.</p> <p>Here is the function:</p> <pre><code>void deleteNode() { int key; nodePtr location = NULL, parent = NULL; cout << "Enter account number to delete: "; cin >> key; cout << endl << endl; bool found = searchTree(key, &location, &parent); if (!found) { cout << "Error! Account number: " << key << " was not found." << endl << endl; } else if (location->left != NULL && location->right != NULL) { //delete node with left and right subtrees nodePtr leftmost = location->right, leftmostParent = NULL; while (leftmost->left != NULL) { leftmostParent = leftmost; leftmost = leftmost->left; } leftmost->left = location->left; if (location->right != leftmost) leftmost->right = location->right; cout << "1" << endl; if (parent != NULL) { if (parent->acctNum > location->acctNum) parent->left = leftmost; else parent->right = leftmost; } leftmostParent->left = NULL; delete location; location = NULL; } else if (location->left != NULL && location->right == NULL) { //delete node with only a left subtree if (parent->acctNum > location->acctNum) parent->left = location->left; else parent->right = location->left; delete location; location = NULL; } else if (location->left == NULL && location->right != NULL) { //delete node with only a right subtree nodePtr leftmost = location->right, leftmostParent = NULL; while (leftmost->left != NULL) { leftmostParent = leftmost; leftmost = leftmost->left; } leftmost->right = location->right; leftmostParent->left = NULL; if (parent->acctNum > location->acctNum) parent->left = leftmost; else parent->right = leftmost; delete location; location = NULL; } else { //delete a leaf node if (location->acctNum > parent->acctNum) parent->right = NULL; else parent->left = NULL; delete location; location = NULL; } } </code></pre>

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