Calling a function from a pointer? C++

Question

I am completely stumped on this one... can anyone help and explain?

Student st;

Student *stPtr = st;

stPtr (what goes here?) printAge();

Answer 1

https://code.sololearn.com/cLheKuoZD23h/?ref=app

This is simple program used to swap two numbers using pointers. Hope this helps you

Answer 2

->

Answer 3

use arrow to access pointer props/methods