[HackerRank] Virtual Functions -Medium

https://www.hackerrank.com/challenges/virtual-functions/problem

Virtual Functions | HackerRank

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

class Professor : public Person
{
    public:
    
void getdata()
    {
        cin>>name>>age>>publications;
        cur_id=++id;
    }
void putdata() const 
    {
        cout<<name<<' '<<age<<' '<<publications<<' '<<cur_id<<endl;
    }
    private:
    int publications;
    int cur_id;
    static int id;
};
int Professor::id=0;

class Student : public Person
{
public:

void getdata()
{
    cin>>name>>age;
     cur_id=++id;
    for(int i=0;i<6;i++)
    {
        cin>>mark[i];
        sum+=mark[i];
    }
}
void putdata() const
{

    cout<<name<<' '<<age<<' '<<sum<<' '<<cur_id<<endl;
}

private:
int mark[6]; 
int cur_id;
static int id;
int sum=0;
};
int Student::id=0;