MATLAB Programming

9 Classes and Objects
Note that the property names are not actually the same as the field names of
the structure array used internally by stock and asset objects. The property
name interface is controlled by the stock and asset set and get methods and
is designed to resemble the interface of other MATLAB object properties.
The asset field in the stock object structure contains the parent asset object
and is used to access the inherited fields in the parent structure.
Stock Class Methods
The stock class implements the following methods:
• Constructor
• get and set
• subsref and subsasgn
• display
The Stock Constructor Method
The stock constructor creates a stock object from three input arguments:
• The stock name
• The number of shares
• The share price
The constructor must create an asset object from within the stock constructor
to be able to specify it as a parent to the stock object. The stock constructor
must, therefore, call the asset constructor. The class function, which is called
to create the stock object, defines the asset object as the parent.
Keep in mind that the asset object is created in the temporary workspace of
the stock constructor function and is stored as a field (.asset) inthestock
structure. The stock object inherits the asset fields, but the asset object is
not returned to the base workspace.
function s = stock(varargin)
% STOCK Stock class constructor.
% s = stock(descriptor, numShares, sharePrice)
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