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#include <iostream.h> struct tree_node { struct tree_node *left; struct tree_node *right; int data; }; struct tree_node * add_node(struct tree_node *root, int data); int main ( void) { struct tree_node root = {0, 0, 123}; add_node(&root, 34); if (root.left) std::cout << "Added to the left\n"; else std::cout << "Added to the right\n"; if (root.left) delete root.left; else delete root.right; return 0; } struct tree_node * add_node(struct tree_node *root, int data) { if (!root) { root = new tree_node(); root->left = root->right = 0; root->data = data; } else if (root->data > data) root->left = add_node(root->left, data); else root->right = add_node(root->right, data); return root; }
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