ABL electronic PIC12 Benutzerhandbuch

The derived types are also known as structured types. These types are used as ele-
ments in creating more complex user-defined types.

Array is the simplest and most commonly used structured type. Variable of array
type is actually an array of objects of the same type. These objects represent ele-
ments of an array and are identified by their position in array. An array consists of
a contiguous region of storage exactly large enough to hold all of its elements.

Array declaration is similar to variable declaration, with the brackets added after
identifer:

type array_name[constant-expression]

This declares an array named as 

array_name

composed of elements of 

type

.

The 

type

can be scalar type (except 

void

), user-defined type, pointer, enumera-

tion, or another array. Result of the 

constant-expression

within the brackets

determines the number of elements in array. If an expression is given in an array
declarator, it must evaluate to a positive constant integer. The value is the number
of elements in the array.

Each of the elements of an array is numbered from 0 through the number of ele-
ments minus one. If the number is 

n

, elements of array can be approached as

variables 

array_name[0]

.. 

array_name[n-1]

of 

type

.

Here are a few examples of array declaration:

#define MAX = 50

vector_one[10];

/* an array of 10 integers */

vector_two[MAX];

/* an array of 50 floats   */

vector_three[MAX - 20];

/* an array of 30 floats   */

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