Why u are writing this->size can we write without it how?

#1

what is meaning of it this->

#2

“->” is referred to as an arrow operator and is used to dereferencing a pointer, so the syntax is the same as (*ptr). Dereferencing a pointer means to get the value of that address, so for example:

struct Person{

string name;

int age;

};

Person *Bob = new Person;

Bob -> age = 21;