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Array constants

To declare an array constant, enclose the values of the array’s elements, separated by commas, in parentheses at the end of the declaration. These values must be represented by constant expressions. For example,

const Digits: array[0..9] of Char = ('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');

declares a typed constant called Digits that holds an array of characters.

Zero-based character arrays often represent null-terminated strings, and for this reason string constants can be used to initialize character arrays. So the declaration above can be more conveniently represented as

const Digits: array[0..9] of Char = '0123456789';

To define a multidimensional array constant, enclose the values of each dimension in a separate set of parentheses, separated by commas. For example,

type TCube = array[0..1, 0..1, 0..1] of Integer;

const Maze: TCube = (((0, 1), (2, 3)), ((4, 5), (6,7)));

creates an array called Maze where

Maze[0,0,0] = 0

Maze[0,0,1] = 1

Maze[0,1,0] = 2

Maze[0,1,1] = 3

Maze[1,0,0] = 4

Maze[1,0,1] = 5

Maze[1,1,0] = 6

Maze[1,1,1] = 7

Array constants cannot contain file-type values at any level.

Topic groups

译文

数组常量

要声明数组常量，需要对常量的值进行封装：数组元素的值之间以逗号隔开，用圆括号将所有的元素括起来。数组元素的值都必需是常量表达式。例如，

const Digits: array[0..9] of Char = ('0', '1', '2', '3', '4', '5', '6', '7', '8', '9');

这里声明了一个叫做Digits的类型常量，它保存了一个字符数组。

零基字符数组通常表示空结束串，因此可以用串常量来初始化字符数组。因此上面的声明可以更便利地声明为：