C++ LANGUAGE BENEFITS OF DATA ABSTRACTION

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C++ LANGUAGE BENEFITS OF DATA ABSTRACTION

Benefits of Data Abstraction 


Data abstraction provides two important advantages: 

• Class internals are protected from inadvertent 
user-level errors, which might corrupt the state 
of the object. 

• The class implementation may evolve over time in 
response to changing requirements or bug reports 
without requiring change in user-level code. 

By defining data members only in the private section 
of the class, the class author is free to make changes 
in the data. If the implementation changes, only the 
class code needs to be examined to see what affect the 
change may have. If data is public, then any function 
that directly access the data members of the old 
representation might be broken.