谁帮忙写段完整C++程序，不要太空

//间单的给你写了个框架，不过你要的功能都有了，你可以打它完善

#include <iostream>
#include <string>
using namespace std;

class person
{
public :
person(string name = "", string id = ""):m_name(name), m_id(id){}
virtual string get() const {return m_name;}//虚函数
~person(){}
protected :
string m_name;//姓名
string m_id;//身份证号
};

class student:public person//类的继承
{
friend istream & operator >> (istream &in, student &stu);//友元运算符重载
public :
student(string name = "", string id = "", string num = ""):person(name, id), m_num(num){}
string get() const {return m_num;}
private :
string m_num;//学号
};
istream & operator >> (istream &in, student &stu)
{
cout << "input student infomation:" << endl;
cout << "name:";
in >> stu.m_name;
cout <<