Pointers’ Arithmetic

Why did we go deep into arrays while learning pointers? The fact is that the array’s name is a pointer to its first element.

We can get the address of the first element of the array by its name or by declaring the pointer:


              12345
            
int arr[5]{1, 2, 3, 4, 5};
int *p = &arr[0];

cout << p << endl;
cout << arr << endl;

In other words, indexing is equivalent to adding (or substructing) to the pointer:


              12
            
cout << *(p+2) << endl;   // equivalent to arr[2]
cout << *(arr+2) << endl; // equivalent to arr[2]

The for loop we used to go through the arrays can also be used with pointers by adding 1 on each step, but we will use these feature pointers in work with functions and dynamic memory in the following sections.

Tutto è chiaro?

Grazie per i tuoi commenti!

Sezione 2. Capitolo 5

Chieda ad AI

Chieda pure quello che desidera o provi una delle domande suggerite per iniziare la nostra conversazione

Contenuti del Corso

C++ Intermediate | Mobile-Friendly