Added the simplelist header file. This version should compile.

SimpleList.h

@@ -0,0 +1,104 @@
+#ifndef SIMPLE_LIST_H
+#define SIMPLE_LIST_H
+
+template<typename T>
+class SimpleList {
+private:
+    struct Node {
+        T data;
+        Node* next;
+
+        Node(const T& value) : data(value), next(nullptr) {}
+    };
+
+    Node* head;
+    Node* tail;
+    Node* read_position;
+    size_t size;
+
+public:
+    SimpleList() : head(nullptr), tail(nullptr), read_position(nullptr), size(0) {}
+
+    ~SimpleList() {
+        clear();
+    }
+
+    void push_back(const T& value) {
+        Node* new_node = new Node(value);
+        if (!head) {
+            head = tail = read_position = new_node;
+        } else {
+            tail->next = new_node;
+            tail = new_node;
+        }
+        ++size;
+    }
+
+    void pop_front() {
+        if (head) {
+            Node* temp = head;
+            head = head->next;
+            if (read_position == temp) {
+                read_position = head;
+            }
+            delete temp;
+            --size;
+            if (!head) {
+                tail = nullptr;
+                read_position = nullptr;
+            }
+        }
+    }
+
+    T* read() {
+        if (read_position) {
+            T* value = &(read_position->data);
+            read_position = read_position->next;
+            return value;
+        }
+        return nullptr;
+    }
+
+    void rewind() {
+        read_position = head;
+    }
+
+    bool is_exhausted() const {
+        return read_position == nullptr;
+    }
+
+    size_t get_size() const {
+        return size;
+    }
+
+    void clear() {
+        while (head) {
+            Node* temp = head;
+            head = head->next;
+            delete temp;
+        }
+        tail = nullptr;
+        read_position = nullptr;
+        size = 0;
+    }
+
+    class iterator {
+        private:
+            Node* current;
+        public:
+            iterator() : current(nullptr) {}  // Add this line: default constructor
+            iterator(Node* node) : current(node) {}
+
+            T& operator*() { return current->data; }
+            T* operator->() { return &current->data; }
+            iterator& operator++() { if (current) current = current->next; return *this; }
+            bool operator!=(const iterator& other) const { return current != other.current; }
+            bool operator==(const iterator& other) const { return current == other.current; }
+    };
+
+    // Add these methods to the SimpleList class if they're not already present
+    iterator begin() { return iterator(head); }
+    iterator end() { return iterator(nullptr); }
+};
+
+#endif // SIMPLE_LIST_H