What is wrong in below code?

Question

https://code.sololearn.com/ca223a172A22

//Compilation error

'class Person' has no member named 'getdata'

Answer 1

You have an array of Person pointers, so when it calls getdata() it will read that pointer as a Person object regardless of what it was instanced as, so when it tries to read getdata it sees that the object (which it's reading as a Person) doesn't have a getdata() method. You'd have to cast it. Or you could put a virtual method which will let it know that a child class could override the method (I THINK; not sure) like this:
public:
virtual void getdata() = 0;
virtual void putdata() = 0;
In the person class

What are the inputs supposed to be? I can't really find out what will fix it if I don't know what to input.