如何让std :: list <std :: string> :: iterator输出错误值？

#include<iostream>
#include <list>

int main() {
    std::list<std::string> my_list = {"hello", "world", "c++"};
    std::list<std::string>::iterator it = my_list.begin();

    // 将迭代器设置为end()
    it = my_list.end();

    // 输出迭代器的值
    if (it == my_list.end()) {
        std::cout << "Iterator is invalid"<< std::endl;
    } else {
        std::cout << "Iterator points to: " << *it<< std::endl;
    }

    // 将迭代器设置为一个无效的地址
    it = reinterpret_cast<std::list<std::string>::iterator>(0x12345678);

    // 输出迭代器的值
    if (it == my_list.end()) {
        std::cout << "Iterator is invalid"<< std::endl;
    } else {
        std::cout << "Iterator points to: " << *it<< std::endl;
    }

    return 0;
}