如何在c++中写入和读取指向文件的抽象类指针？

#include <iostream>
#include <fstream>

AbstractClass* obj = new ConcreteClass();

std::ofstream file("filename.txt");
if (!file) {
    std::cout << "文件打开失败！" << std::endl;
    return -1;
}

file.write(reinterpret_cast<const char*>(obj), sizeof(AbstractClass));

file.close();

std::ifstream file("filename.txt");
if (!file) {
    std::cout << "文件打开失败！" << std::endl;
    return -1;
}

AbstractClass* newObj = new ConcreteClass();

file.read(reinterpret_cast<char*>(newObj), sizeof(AbstractClass));

file.close();