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Old June 2nd, 2004, 02:42 AM
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Default What is abstraction...?

can any one tell me that how can define Abstraction and Data hiding.I mean that what is the simple defination of abstraction and data hiding.

thankx


arshad mahmood
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Old June 8th, 2004, 02:13 AM
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Data hiding is concept of making your data private i.e. only accesible within the class member functions.

e.g
       class check
       {

           private:
/* This is private data cant access outside the class */
            int i ;
           public:
             int j;
         };

main()
{
  Check c1;

  c1.i=0; //// Error
   c1.j=0; ///works fine


}

       HTH






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Old June 30th, 2004, 01:28 AM
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Abstraction is simply a way of modelling entities by focusing on the important attributes and suppressing the less important details.
This means as decomposition proceeds, the design of components is expressed gradually in more concrete terms until at the lowest level of abstraction when the design is ready for translating into some programming language.

Information hiding is when the modules sh'd be characterised by design decision and each, hiding information from all the others.
i.e each info in each module sh'd be hidden or not accessed by other modules that don't need it.
Hope this info. helps u.

programmed.

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