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Syntax in C++

  • When we consider a C++ program, it can be defined as a collection of objects that communicate via invoking each other's methods
  • Let us now briefly look into what do class, object, methods and Instance variables mean.
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Object

  • Objects have Properties and Behaviors.
  • Example: A dog has Properties - color, name, breed as well as Behaviors - wagging, barking, eating. An object is an instance of a class.
  • C++ programs create, access, manipulate, and destroy objects. An object is a piece of memory that can be used to store values.
  • You can think of an object as a mailbox, or a cubbyhole, where we can store and retrieve information.
  • All computers have memory, called RAM (random access memory), that is available for programs to use.
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    learn c++ tutorials - class object model Example

  • When an object is defined, a piece of that memory is set aside for the object.
  • Most of the objects that we use in C++ come in the form of variables.

Class

  • A class can be defined as a template/blueprint that describes the behaviors/states that object of its type support. A class is a blueprint for the object.

Methods

  • A method is basically a behavior. A class can contain many methods .
  • It is in methods where the logics are written, data is manipulated and all the actions are executed.
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Instance Variables

  • Each object has its unique set of instance variables.
  • An object's state is created by the values assigned to these instance variables.
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