Lập trình hướng đối tượng: Session 4 - Class Basics

• Upon creation, each element, starting from the first, calls the no-arguments. constructor for itself[r]

Objectives

• Class Basics

– Classes – UML

– Privacy

– Constructors – Destructors

Class Basics

• A class is a derived data type the

members of which are private by default • Classes are much more common in

object-oriented programming than

CLASSES

• The keyword class identifies a class

class Student {

int no; char grade[14]; public:

Instance of a Class(1)

• An instance of a class is called object • The declaration of an instance allocates

memory for the object

• The form of an instance declaration is

Identifier instance;

– Identifier is the name of the class

ARRAYS OF OBJECTS

• An array of objects occupies contiguous memory

• Upon creation, each element, starting from the first, calls the no-arguments

constructor for itself

• Upon destruction, each element, starting from the last element created and

Summary

• Class Basics

– Classes – UML

– Privacy

– Constructors – Destructors

– Arrays of Objects