Encapsulation of Objects and Methods in C++, describes how the basic OOP techniques are accomplished.

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Encapsulation of Objects and Methods in C++

When we fully encapsulate code, we actually build an impenetrable wall to protect the contained code from accidental corruption due to the silly little errors that we are all prone to make. We also tend to isolate errors to small sections of code to make them easier to find and fix. We will have a lot more to say about the benefits of encapsulation as we progress through this Module.

Encapsulation is the basic method for producing information hiding in object-oriented methodology. The following program [OPEN.CPP] is a 'conventional' program that incorporates no information hiding, largely because of the use of global identifiers.