Inheritance
We discussed three types of relationships between objects: association, composition, and aggregation. However, we have not fully specified our chess set, and these tools don't seem to give us all the power we need. We discussed the possibility that a player might be a human or it might be a piece of software featuring artificial intelligence. It doesn't seem right to say that a player is associated with a human, or that the artificial intelligence implementation is part of the player object. What we really need is the ability to say that "Deep Blue is a player" or that "Gary Kasparov is a player".
The is a relationship is formed by inheritance. Inheritance is the most famous, well-known, and over-used relationship in object-oriented ...
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