不使用c++的语言特性，重写一个类型为template<typename K, typename V>的map模板类和对应的map迭代器

好的，我可以为你重写一个简单的map模板类和对应的迭代器，不使用C++的语言特性。

首先，让我们定义一个节点类来表示我们的映射表中的每个键值对：

template<typename K, typename V>
struct MapNode {
    K key;
    V value;
    MapNode* left;
    MapNode* right;

    MapNode(K key, V value) {
        this->key = key;
        this->value = value;
        left = nullptr;
        right = nullptr;
    }
};

接下来，我们定义一个map类来管理我们的节点：

template<typename K, typename V>
class Map {
private:
    MapNode<K, V>* root;

public:
    Map() {
        root = nullptr;
    }

    void insert(K key, V value) {
        if (root == nullptr) {
            root = new MapNode<K, V>(key, value);
        } else {
            MapNode<K, V>* current = root;
            while (current) {
                if (key < current->key) {
                    if (current->left == nullptr) {
                        current->left = new MapNode<K, V>(key, value);
                        return;
                    }
                    current = current->left;
                } else if (key > current->key) {
                    if (current->right == nullptr) {
                        current->right = new MapNode<K, V>(key, value);
                        return;
                    }
                    current = current->right;
                } else {
                    current->value = value;
                    return;
                }
            }
        }
    }

    bool contains(K key) {
        MapNode<K, V>* current = root;
        while (current) {
            if (key < current->key) {
                current = current->left;
            } else if (key > current->key) {
                current = current->right;
            } else {
                return true;
            }
        }
        return false;
    }

    V& operator[](K key) {
        MapNode<K, V>* current = root;
        while (current) {
            if (key < current->key) {
                if (current->left == nullptr) {
                    current->left = new MapNode<K, V>(key, V());
                    return current->left->value;
                }
                current = current->left;
            } else if (key > current->key) {
                if (current->right == nullptr) {
                    current->right = new MapNode<K, V>(key, V());
                    return current->right->value;
                }
                current = current->right;
            } else {
                return current->value;
            }
        }
    }

    class Iterator {
    private:
        MapNode<K, V>* current;

    public:
        Iterator(MapNode<K, V>* root) {
            current = root;
            while (current && current->left) {
                current = current->left;
            }
        }

        bool hasNext() {
            return current != nullptr;
        }

        MapNode<K, V>* next() {
            MapNode<K, V>* node = current;
            if (current->right) {
                current = current->right;
                while (current->left) {
                    current = current->left;
                }
            } else {
                while (current->parent && current->parent->left != current) {
                    current = current->parent;
                }
                current = current->parent;
            }
            return node;
        }
    };

    Iterator begin() {
        return Iterator(root);
    }

    Iterator end() {
        return Iterator(nullptr);
    }
};

这个map类支持插入、查询和下标操作，并且我们还定义了一个迭代器类来遍历映射表中的所有键值对。

希望这个简单的实现对你有所帮助！