Object-Oriented Programming: Classes, Constructors, and Destructors, Slides of Computer Programming

Download Object-Oriented Programming: Classes, Constructors, and Destructors and more Slides Computer Programming in PDF only on Docsity! Introduction of Programming Lecture 27 Docsity.com Today’s Lecture – Classes and objects – Constructors – Destructors – Member functions – Member data Docsity.com Multiple Media Docsity.com Classes Objects Constructors Docsity.com Data Hiding Encapsulation Docsity.com The majority of programming problems occur because of the use of un-initialized data. Docsity.com Constructor  Name of the constructor is same as the name of the class  It does not return any thing, not even void Docsity.com Example class Date { int month ; int day ; int year ; public: Date ( int day = 1 , int month = 1 , int year = 1 ) } ; Docsity.com class Date { public : Date ( int month = 1 , int day = 1 , int year = 1 ) ; private : int month , day , year ; } ; Example Docsity.com main ( ) { Date mydate ( ) ; } Example Docsity.com main ( ) { Date mydate ( “01-Jan-2002” ) ; } Example Docsity.com Friend Functions Docsity.com Destructor Docsity.com Docsity.com main ( ) { Date mydate ( 35 , 13 , 2000 ) ; } Example 1 Docsity.com main ( ) { Date mydate ; mydate.setDate ( 21 , 01 , 1979 ) ; } Example 1 Docsity.com Example 1 main ( ) { Date mydate ( 21 , 01 , 1979 ) ; } Docsity.com a Destructors ~ className ( ) ; Destructors ~Date :: Date ( ) { cout<< “Object Destroyed” ; } Docsity.com Constructors Date :: Date ( ) { cout << “Date Object Created” ; } Docsity.com