C: Pointers & Arrays

- Pointer

Variables which store the addresses of other variables (including other pointers). Initialized by *(variable name).

int x;
int *aa;
aa = &x;

*aa is a pointer which stores the address of x.


- Array

Groups of variables stored with same variable names. Initialized by (variable name)[array size].

int aa[5];

aa is an array which can store up to five integer variables.


- Two-Dimensional & Three-Dimensional Arrays

Two-Dimensional Arrays can be initialized by (variable name)[length][width]. The amount of variables which can be stored is length*width.

Three-Dimensional Arrays can be initialized by (variable name)[length][width][height]. The amount of variables which can be stored is length*width*height.


- Accessing Arrays

aa[(array size)];

Variables are stored in aa[0] to aa[(array size - 1)].

Any element of an array can be accessed through either *(aa+x) or aa[x], where x is (element number - 1).

For example, to access the second element, either *(aa+1) or aa[1] can be used (the element number is 2, 2 - 1 = 1).


- String

Array of char variables ending with \0. Initialized with char (string name)[string length].


2201757635
skyconnectiva.com
binus.ac.id
Juanda P. G.

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