在C++中持久化std :: map

#include<iostream>
#include <fstream>
#include <map>
#include<string>
#include<boost/archive/text_oarchive.hpp>
#include<boost/archive/text_iarchive.hpp>

int main() {
    std::map<int, std::string> my_map;
    my_map[1] = "one";
    my_map[2] = "two";
    my_map[3] = "three";

    // 将map对象序列化到文件中
    std::ofstream ofs("my_map.txt");
    boost::archive::text_oarchive oa(ofs);
    oa << my_map;
    ofs.close();

    return 0;
}

int main() {
    // 从文件中恢复map对象
    std::ifstream ifs("my_map.txt");
    boost::archive::text_iarchive ia(ifs);
    std::map<int, std::string> my_map;
    ia >> my_map;
    ifs.close();

    // 输出恢复后的map对象
    for (const auto& kv : my_map) {
        std::cout << kv.first << " -> " << kv.second<< std::endl;
    }

    return 0;
}