If in a derived class it is necessary to determine the concrete implementation of an element (method, property) of an abstract class, then the override keyword is indicated when declaring an element. An abstract method does not contain a method body. If an abstract element (method, property) is declared in an abstract class, then the keyword abstract is placed in front of the name of such a class. The method refers to the same method of the base class.Īn abstract class is a class in which there is at least one abstract element (method, property). virtual method Print() to display the internal fields of the class.Area() method that returns the area of a triangle by its sides.the Area2 property that defines the area of a triangle along its sides a, b, c.Each method receives 3 parameters which are the lengths of the sides of the triangle methods SetABC(), GetABC() for accessing the fields of the class.hidden internal fields a, b, c (sides of the triangle).The class realize the following elements:
virtual method Print(), which displays the name of the figure.ĭevelop a Triangle class that inherits (extends) the capabilities of the Figure class.the Area() abstract method, intended to obtain the area of a figure.the Area2 abstract property, intended to obtain the area of the figure.Name property to access the internal name field.a constructor with 1 parameter, initializing the name field with the specified value.private internal field name (figure name).Implementation of function Main().Testing the classĭevelop an abstract class Figure, which define the following elements: Method Print().Overriding a virtual function of a base class Overriding the abstract method of the base class Figures Overriding the abstract property of the base class Figures Get the value of the internal fields of the Triangle class Method SetABC().Writing values to internal fields of the Triangle class Initialization of internal fields of the base class Figures and derived class Triangle Access to the Figures class internal field Considerations regarding the general arrangement and construction of classes Create an application using the Console Application template. create class hierarchies that maximize the benefits of polymorphism.develop programs using abstract classes, abstract methods and properties.The example describes in detail the step-by-step process of developing an abstract class that contains abstract properties and methods.Īfter completing these instructions, you will learn: An example of using an abstract class that contains abstract properties and methods
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