Pointers in C Programming: A Modern Approach to Memory Management, Recursive Data Structures, Strings, and Arrays

© Thomas Mailund 2021

T. MailundPointers in C Programminghttps://doi.org/10.1007/978-1-4842-6927-5_3

3. Pointers

Thomas Mailund¹  

(1)

Aarhus N, Denmark

 

You can store the address of an object in another object, and this is where we get to pointers. A pointer is a variable that stores memory addresses of other objects. You declare a variable to be a pointer by adding an asterisk, *, after the type it points to. If we declare

int i = 1;

int *pi = &i;

int **ppi = π

then i is an integer, pi is a pointer to an integer (it has type int *), and ppi is a pointer to a pointer to an integer (it has type int **, so it is a pointer to int *, which is a pointer to an integer). The pi variable stores the address for i (because we assign pi = &i), and the ppi variable ...