
Data Structure

This illustrates a data structure, a means of storing data within a program.

You may see other such structures in the Data Structures category.


Task

Create a compound data type:

  Point(x,y) 



A compound data type is one that holds multiple independent values.



Related task

   Enumeration


See also

 Array
 Associative array: Creation, Iteration
 Collections
 Compound data type
 Doubly-linked list: Definition, Element definition, Element insertion, List Traversal, Element Removal
 Linked list
 Queue: Definition, Usage
 Set
 Singly-linked list: Element definition, Element insertion, List Traversal, Element Removal
 Stack


 
{ref,public} (* class *)
	Point = object(ord,abs: integer)
	var
		(* instance variables *)
		{public,immutable} x,y: integer;
 
	(* method *)
	procedure {public} Ord():integer;
	begin
		return y
	end Ord;
 
	(* method *)
	procedure {public} Abs():integer;
	begin
		return x
	end Abs;
 
	(* constructor *)
	begin
		self.x := ord;
		self.y := abs;
	end Point;
 