Guess the output. ( Challange)

Question

With full explanation about how the code works including its geometry.

https://code.sololearn.com/cR6gUidbrNhp/?ref=app

Answer 1

Answer should CB. In the code you wrote fun as virtual.

A *a = new C;
A *b = new B;
a->fun(); //print C
b->fun(); //print B