Virtual_Functions.cpp

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
class Person
{
    public:
        int age;
        string name;
        virtual void putdata(){
        	//do nothing 
		}
        virtual void getdata()
        {
           //do nothing 
		}
};
class Professor: public Person
{
    public:
        int publications;
        static int id;
        int cur_id;
        Professor()
        {
            id++;
        }
        void getdata()
        {
            cin>>name>>age>>publications;
            cur_id=id;
        }
        void putdata()
        {
            cout<<name<<" "<<age<<" "<<publications<<" "<<cur_id<<endl;
        }
};
int Professor::id=0;
class Student: public Person
{
    public:
        int marks[6];
        int cur_id;
        int total;
        static int id;
    Student()
    {
        id++;    
    }    
    void getdata()
    {
     cin>>name>>age;
     for(int i=0;i<6;i++)
     {
      cin>>marks[i];    
     }
     total=0;
     for(int i=0;i<6;i++)
     {
         total+=marks[i];
     }
     cur_id=id;
    }
    void putdata()
     {
         cout<<name<<" "<<age<<" "<<total<<" "<<cur_id<<endl;
     }        
};
int Student::id =0;
int main(){

    int n, val;
    cin>>n; //The number of objects that is going to be created.
    Person *per[n];

    for(int i = 0;i < n;i++){

        cin>>val;
        if(val == 1){
            // If val is 1 current object is of type Professor
            per[i] = new Professor;

        }
        else per[i] = new Student; // Else the current object is of type Student

        per[i]->getdata(); // Get the data from the user.

    }

    for(int i=0;i<n;i++)
        per[i]->putdata(); // Print the output for each object.

    return 0;

}