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:
12345int 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:
12cout << *(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.
Tack för dina kommentarer!
Fråga AI
Fråga AI
Fråga vad du vill eller prova någon av de föreslagna frågorna för att starta vårt samtal
Ställ mig frågor om detta ämne
Sammanfatta detta kapitel
Visa verkliga exempel
Awesome!
Completion rate improved to 2.94Pointers’ Arithmetic
Svep för att visa menyn
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:
12345int 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:
12cout << *(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.
Tack för dina kommentarer!
