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Objects and Classes in C++

21 September, 2018

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Objects

  • ‘C’ is a collection of functions but ‘C++’ is a collection of class and object
  • Object is an instance of class
  • Allocating memory for members of class, is called as instance
  eg : int x float y                                  instance employee emp  

What do you mean by SBI of an object  ?

SBI  -  - > state behavior identity
  • SBI stand for state, Behavior and identity since every object has the above the rule
State :  It is a just a value to the attribute of an object at a particular time. Behavior    It describes the action and their reactions of that object Identity :   An object has an identity that characterizes its own existence   Screenshot_1    
Class Object
Data type/ user defined Instance of class
It is a logical entity Object is a physical entity
Class does not have state it having state.
   
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