小编Zha*_*man的帖子

我有Node课。成员是int id, 和指向下一个节点的指针：Node* next。我按如下方式实现了构造函数和析构函数：

#include <iostream>

class Node
{
public:
  int id;
  Node *next;
  Node() : id(0), next(nullptr) {}
  explicit Node(int id) : id(id), next(nullptr) {}

  ~Node() {
    std::cout << (*this) << " destructed \n";
    delete next;
    next = nullptr;
  }

  friend std::ostream &operator<<(std::ostream &os, const Node &node) {
    os << "Node(" << node.id << ")";
    return os;
  }
};

int main()
{
  Node *node0;
  Node *node1;
  node0 = new Node(0);
  node1 = new …