struct node {
    int data;
    struct node* left;
    struct node* right;
};

int height(struct node* node) {
    if (node == NULL) return 0;
    else {
        int left_height = height(node->left);
        int right_height = height(node->right);
        if (left_height > right_height) return(left_height + 1);
        else return(right_height + 1);
    }
}
Kopyala