What is class invariant?

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What is class invariant?

Post  Admin on Sun Jan 31, 2010 5:33 pm

Answer:
A class invariant is a condition that defines all valid states for an object. It is a logical condition to ensure the correct working of a class. Class invariants must hold when an object is created, and they must be preserved under all operations of the class. In particular all class invariants are both preconditions and post-conditions for all operations or member functions of the class.

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