The this Pointer

Inside a member function, this is a pointer to the specific object the function was called on — useful when a parameter name shadows a member, or to return the object itself for chaining:

class Counter {
private:
    int count = 0;

public:
    Counter &increment() {
        this->count++;
        return *this; // enables chaining
    }

    int getCount() const {
        return count;
    }
};

Counter c;
c.increment().increment().increment();
std::cout << c.getCount() << std::endl; // 3