#include<iostream>

#include<fstream>

#include<string>

#include<cstring>

using namespace std;

class Student

{

public:

    Student(string number="", double score=, const char *name="noname")

    {

        this->number = number;

        this->score = score;

        this->name = new char[strlen(name) + ];//之前写的程序总是忘记开辟空间这一步

        strcpy(this->name, name);

    }

    ~Student() {

        //cout<<"~Stu()...."<<endl;

        delete[] name;

    }

        friend istream &operator>>(istream & is, Student& dt) {

        is >> dt.number>>dt.name>>dt.score;

        return is;

    }

    friend ostream &operator<<(ostream & os, Student& dt) {

        os << dt.name << "\t" << dt.number << "\t" << dt.score << "\n";

        return os;

    }

private:

    char *name;

    string number;

    double score;

};

int main()

{

    Student st[];

    int i;

    for(i=;i<;i++)

    cin>>st[i];

    ofstream fout("date.dat",ios::binary);  

    for(i=;i<;i++)

    fout.write((char*)&st[i],sizeof(st[i]));

    fout.close( );  

    ifstream fin("date.dat",ios::binary);

    for(i=;i<;i++)

    fin.read((char*)&st[i],sizeof(st[i]));

     cout <<"姓名\t"<<"学号\t"<<"分数\n";

    for(i=;i<;i++)

    cout <<st[i];

    fin.close( );

    getchar();getchar();

    return ;

}