#include <iostream>
#include <fstream>
#include <string>

class Money
{
private:
    int yuan, jiao, fen;

public:
    Money(int _yuan = 0, int _jiao = 0, int _fen = 0)
        : yuan{_yuan}, jiao{_jiao}, fen{_fen}
    {
    }
    friend std::ostream &operator<<(std::ostream &os, const Money &m)
    {
        if (&os == &std::cout)
            return os << m.yuan << "元" << m.jiao << "角" << m.fen << "分\n";
        else
            return os << m.yuan << ' ' << m.jiao << ' ' << m.fen << '\n';
    }
    void save_to_binary(const char *filename)
    {
        std::ofstream ofile(filename, std::ios::binary);
        ofile.write(reinterpret_cast<char *>(&yuan), sizeof(yuan));
        ofile.write(reinterpret_cast<char *>(&jiao), sizeof(jiao));
        ofile.write(reinterpret_cast<char *>(&fen), sizeof(fen));
        ofile.close();
    }
    void read_from_binary(const char *filename)
    {
        std::ifstream ifile(filename, std::ios::binary);
        ifile.read(reinterpret_cast<char *>(&yuan), sizeof(yuan));
        ifile.read(reinterpret_cast<char *>(&jiao), sizeof(jiao));
        ifile.read(reinterpret_cast<char *>(&fen), sizeof(fen));
        ifile.close();
    }
};

int main()
{
    Money m{1, 2, 3}, n{};
    m.save_to_binary("money.dat");
    n.read_from_binary("money.dat");
    std::cout << n;
    return 0;
}