When do you use the “this” keyword? [closed]

Answer 1

[C++]

this is used in the assignment operator where most of the time you have to check and prevent strange (unintentional, dangerous, or just a waste of time for the program) things like:

A a;
a = a;

Your assignment operator will be written:

A& A::operator=(const A& a) {
    if (this == &a) return *this;

    // we know both sides of the = operator are different, do something...

    return *this;
}