在c++中重载链表的运算符+=

#include <iostream>

class Node {
public:
    int data;
    Node* next;
    
    Node(int value) {
        data = value;
        next = nullptr;
    }
};

class LinkedList {
private:
    Node* head;
    
public:
    LinkedList() {
        head = nullptr;
    }
    
    void addNode(int value) {
        Node* newNode = new Node(value);
        
        if (head == nullptr) {
            head = newNode;
        } else {
            Node* temp = head;
            while (temp->next != nullptr) {
                temp = temp->next;
            }
            temp->next = newNode;
        }
    }
    
    void display() {
        Node* temp = head;
        while (temp != nullptr) {
            std::cout << temp->data << " ";
            temp = temp->next;
        }
        std::cout << std::endl;
    }
    
    // 重载+=运算符
    void operator+=(const LinkedList& otherList) {
        Node* temp = head;
        while (temp->next != nullptr) {
            temp = temp->next;
        }
        temp->next = otherList.head;
    }
};

int main() {
    LinkedList list1;
    list1.addNode(1);
    list1.addNode(2);
    list1.addNode(3);
    
    LinkedList list2;
    list2.addNode(4);
    list2.addNode(5);
    list2.addNode(6);
    
    list1 += list2;  // 使用+=运算符合并链表
    
    list1.display();  // 输出合并后的链表
    
    return 0;
}

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