struct person
{
    string name{""};
    int age{0};
    string sex{""};
};

int main()
{
    vector<person> v;
    vector<person> v1;
    person p;

    {
        p.name="adam";
        p.age=22;
        p.sex="male";
        v.push_back(p);
    }
    {
        p.name="shaun";
        p.age=23;
        p.sex="male";
        v.push_back(p);
    }
    {
        p.name="megan";
        p.age=24;
        p.sex="female";
        v.push_back(p);
    }


    ofstream os("record.dat",ios_base::binary|ios_base::app);

    for(int i=0;i<v.size();++i)
    {
        os.write((char*) &v[i],sizeof(p));
    }
    os.close();



    ifstream is("record.dat",ios_base::binary);

    if(!is) cout<<"file not found";


    while(is.read((char*)&p,sizeof(p)))
    {
        v1.push_back(p);
    }
    is.close();

    for(auto a:v1)
    {
        cout<<a.name<<" "<<a.age<<" "<<a.sex<<endl;
    }


    return 0;
}