Указатель this

#include "Number.h"
 
using namespace std;
 
Number::Number() {
    presentation = "";
    p = 0;
    M = 0.0;
    cout << "Konstruktor bez parametrov dlya obyecta " << this << endl;
}
Number::Number(string presentation, int p, float M) {
    this->presentation = presentation;
    this->p = p;
    this->M = M;
    cout << "Konstruktor s parametrami dlya obyecta " << this << endl;
}
Number::Number(const Number& src) {
    this->presentation = src.presentation;
    this->p = src.p;
    this->M = src.M;
    cout << "Konstruktor copirovaniya dlya obyecta " << this << endl;
}
Number::~Number() {
    cout << "Destruktor dlya obyecta " << this << endl;
}
string Number::get_presentation() {
    return this->presentation;
}
int Number::get_p() {
    return this->p;
}
float Number::get_M() {
    return this->M;
}
void Number::set_presentation(string presentation) {
    this->presentation = presentation;
}
void Number::set_p(int p) {
    this->p = p;
}
void Number::set_M(float M) {
    this->M = M;
}
void Number::show() {
    cout << "Strokovoe predstavlenie: " << this->presentation << endl;
    cout << "Mantissa: " << this->M << endl;
    cout << "Poryadok: " << this->p << endl;
}