Introduction to Classes

Object-oriented programming (OOP) is a conceptual approach to design programs. It can be executed in many languages, whether they directly support OOP concepts or not. The C language also can be used to execute many of the object-oriented principles. Though, C++ supports the object-oriented features directly. All these features like Data abstraction, Data encapsulation, Information hiding etc have one thing in common - the vehicle that is used to execute them. The vehicle is " class."

Class is a user defined data type just like structures, but with a difference. It also has three sections namely private, public and protected. Using these, access to member variables of a class can be strictly controlled.