Записать vector структур в бинарный файл

void init(vector<abonent> list, bool append) {
        ofstream binary_file;
        binary_file.open(name, ios_base::out | ios_base::binary | (append ? ios_base::app : ios_base::trunc));
 
        for (abonent ab : list) {
            binary_file.write((char *) &ab, sizeof(ab));
        }
 
        binary_file.close();
    }
 
    vector<abonent> read() {
        ifstream binary_file;
        binary_file.open(name, ios_base::in | ios_base::binary);
 
        vector<abonent> list;
 
        while (!binary_file.eof()) {
            abonent ab;
            binary_file.read((char*) &ab, sizeof(ab));
            list.push_back(ab);
        }
 
        binary_file.close();
 
        return list;
    }

    void init(vector<abonent> list, bool append) {
        ofstream binary_file;
        binary_file.open(name, ios_base::out | ios_base::binary | (append ? ios_base::app : ios_base::trunc));
 
        typename vector<abonent>::size_type size = list.size();
        binary_file.write((char*) &size, sizeof(size));
        binary_file.write((char*) &list[0], list.size() * sizeof(abonent));
 
        binary_file.close();
    }
 
    vector<abonent> read() {
        ifstream binary_file;
        binary_file.open(name, ios_base::in | ios_base::binary);
 
        vector<abonent> list;
        typename vector<abonent>::size_type size = 0;
        binary_file.read((char*) &size, sizeof(size));
        list.resize(size);
        binary_file.read((char*) &list[0], list.size() * sizeof(abonent));
 
        binary_file.close();
 
        return list;
    }

struct date {
    int day;
    int month;
    int year;
};
 
struct abonent {
    string surname;
    date connect_date;
    string number;
};