增量运算符/迭代器实现

Question

我想在这里弄清楚几件事：

1. 如何为具有指向下一个节点的指针的节点类编写增量运算符？

2. 如何为下面的类实现迭代器？

   #include <iostream>
   #include <vector>
   using namespace std;
   
   template <typename T>
   class Node {
   public:
       Node(int i=0):val(i) {}
       Node*& operator++(int i=0) {return next;};
   
       T val;
       Node *next;
   };
   
   //================================================
   int main() {
   
       Node<int> *head, *tmp1, *tmp2;
   
       tmp1 = new Node<int>(0); 
       head = tmp1;
   
       for (int i=1; i<10; ++i) {
   
           tmp2 = new Node<int>(i);
           tmp1->next = tmp2;
           tmp1 = tmp2;
       }
   
       while (head != NULL) {
   
           cout << head->val << " '";
           head = head->operator++(0);    //How do I make it work with ++head;?
       }
   }
   

这不是演示运算符重载或迭代器的好例子。

Answer 1