please anwer this question in commenta in the code

Question

its about c++ class
https://code.sololearn.com/cgx1NxioPXtq/?ref=app

Answer 1

On line 11 you have created the Constructor of a class.
Constructors are called automatically when an object/instance of a class is created.
The code inside Constructors execute only once. They are used for various purposes like to initialize the variables of a class.

Note:
If you haven't created the Constructor of a class, the default constructor(empty) will be created and called when object of a class is created.

And to answer your second question visit this link :
https://stackoverflow.com/questions/15680190/what-is-the-diff%C3%A9rence-between-include-iostream-h-and-include-iostream

Answer 2

thank you