data hiding

• Data Hiding is also known as Encapsulation.
• Encapsulation is the process of combining data and function into a single unit called class.
• Data Hiding is the mechanism where the details of the class are hidden from the user.
• The user can perform only a restricted set of operations in the hidden member of the class.
• Encapsulation is a powerful feature that leads to information hiding,abstract data type and friend function.
• They encapsulate all the essential properties of the object that are to be created.
• Using the method of encapsulation the programmer cannot directly access the class.

Access Specifier:

There are three types of access specifier.They are

• Private :Within the block.
• Public:Whole over the class.
• Protected:Act as a public and then act as a private.

General Form:

class class name

{

private:

datatype data;

public:

Member functions;

};

main()

{

classname objectname1,objectname2……………;

} 

Example:

class Square

{

private:

int Num;

public:

void Get()    {

    cout<<"Enter Number:";

    cin>>Num;

}

void Display()    {

    cout<<"Square Is:"<<Num*Num;

}

};

void main()

{

Square Obj;

Obj.Get();

Obj.Display();

getch()

}