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Object  Oriented Programming    With   C++

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Class object Inheritance Abstraction Encapsulation Polymorphism

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A  class   is   a   collection   of  objects   of  similar   type. Example:- mango,   apple   and   orange   are	members   of   the    class   fruit. Classes   are   user-defined	 data   type   and   built-    in   type	 of	a   programming   language. fruit   mango: will   create   an  object   mango   belonging   to  the    class fruit

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Object  are   the   basic  run   time   entity  in   an    object   –oriented   system. They   may   represent   a  person,   a   place,   a  bank    account,   a  table  of   data   or   any   item   that    program  has   handle.

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O B J E C T   :     emp D AT A   : Emp_no   Name    Age    Salary FUNCTIONS   : Getdata	 (input)    Total		 (find   total    salary) Display	 (output)

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It is   the  capability   of one   class   to  inherit    properties   from   another   class. 5   types   of   inheritance Single   level Multilevel Multiple Hierarchical Hybrid

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Definition  :-  The  wrapping  up of  data  and    functions   into   a  single   unit. Data   encapsulation	 is   the   most   striking    feature   of   class. Encapsulation  means  that  some or  all  of  an    object's  internal structure  is "hidden"  from    the  outside   world.

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polymorphism  is the  ability of objects of    different  types  to  respond  to  functions of    the  same   name.

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Virtual   functions. Operator   overloading. Function   overloading.

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Through  inheritance,  we can  eliminate code and    extend   the   use   of   existing   classes. Reusability. Easy   to understand. Models   the   real   world   well. The  principle   of	data   hiding   helps   the   programmer   to    build   secure   programs. Software   complexity  can   be   easily   managed.

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It is essay to partition  the  work in a project based  on    object. Software   complexity  can   be   easily  managed. Object   –oriented   system  can   be   easily   upgraded   from    small   to  large  system.

Object Oriented Programming With C++

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