Descritpion

Submission

There are 2 major points here, pure virtual function and static member variable.

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

class Person
{
protected:
    string name;
    int age;
    int cur_id;
public:
    virtual void getdata() = 0;
    virtual void putdata() = 0;
};

class Professor : public Person
{
    int publications;
    static int id;
public:
    void getdata()
    {
        cin >> name >> age >> publications;
        cur_id = ++Professor::id;
    }

    void putdata()
    {
        cout << name << " " << age << " " << publications << " " << cur_id << endl;;
    }
};

class Student : public Person
{
    int sum;
    static int id;
public:
    void getdata()
    {
        cin >> name >> age;
        sum = 0;
        for(int i = 0; i < 6; i++) {
            int tmp;
            cin >> tmp;
            sum += tmp;
        }
        cur_id = ++Student::id;
    }

    void putdata()
    {
        cout << name << " " << age << " " << sum << " " << cur_id << endl;
    }
};

int Professor::id = 0;
int Student::id = 0;

int main(){

References

1. https://en.cppreference.com/w/cpp/language/static