Objects and Classes

Object:

• It is the basic run-time entity of object-oriented programming.
• You can define it as the set of properties and operations performed by using an entity`s property set is known as an object.
• It is the collection of data members and associated member functions

Class:

• Class is the description of the contents of the objects that belongs to it.
• It is a user-defined data type that is defined by using the keyword "class".
• It is the collection of data members and member functions.
• Data members and member functions accessed by 2 accessed specifiers are: private, protected, and public.
• By default, the class has private access specifier.

Private: 

When the data is defined in a class privately then it can be accessed only in that class or by the member functions of that class.

It can not be inherited by another class.

Protected:

When the data is defined in a class as protected then it can be inherited by other classes.

It can only be accessed within the class in which it had defined and in the friend classes.

Public:

When the data is defined in a class as public then it can be accessed within the class as well as outside the class.

For Example:

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.

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Class emp

{

    ......

};

.

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int main()

{

    emp E1;

}

Here emp is the class and E1 is the object of emp.