We can also use a pointer to access the object's members. The following pointer points to the obj object:

MyClass obj;
MyClass *ptr = &obj;

access memeber

The arrow member selection operator (->) is used to access an object's members with a pointer.

ptr->myPrint();

When working with an object, use the dot member selection operator (.). When working with a pointer to the object, use the arrow member selection operator (->).

this

Inside a member function, this may be used to refer to the invoking obj.

Friend functions do not have a this pointer, because friends are not members of a class.

e.g.The printInfo() method offers three alternatives for printing the member variable of the class.

class MyClass {
public: 
    MyClass(int a): var(a){}
    void printInfo() { 
        cout << var << end;
        cout << this->var << end;
        cout << (*this).var << end;
    }
private:
    int var;
};

The this keyword has an important role in operator overloading.