By Al Stevens
Examine the basics of constructing and utilizing item orientated databases with C++ Database improvement, 2d version . This finished advisor covers the heritage and ideas of database administration, complicated options for designing and writing C++ power item database courses, and utilizing PARODY the continual, Almost-Relational item Database supervisor. C++ Database improvement, 2d variation additionally incorporates a bonus diskette with resource code for PARODY and all of the examples from the e-book.
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Extra info for C++ Database Development
The original class is called the base class and the new class is called the derived class. These classes are also called the superclass and the subclass. The word subclass is also used as a verb to mean the act of inheriting. This book refers to base classes and derived classes exclusively. Chapter2: An Introduction to Object-OrientedProgramming The derived class inherits the data representation and behavior of the base class except where the derived class modifies the behavior by overloading member functions.
The conversions are not restricted to converting between abstract data types and primitive data types. You can convert between abstract data types in the same manner. For example, you might have a Date class and a JulianDateclass, and the same principles apply. 7 Implicit conversion methods Member Functions Having just learned about methods and messages in detail, you soon find that the terms themselves are not used much in C++ circles. The terms come from the object-oriented lexicon and reflect the syntax of pure object-oriented programming languages such as Smalltalk.
You could define the obifile object as static and get it out of the object's data space. That would solve that particular problem if all Persistentobjects used the same file, but the bug is an indication of ones that your derived classes could have as well. Many derived classes would have objects that should not be read and written. Some data variables deal with the run-time context. There could be state variables such as input/output handles or user interface window handles that depend on run-time conditions and that must not or should not persist beyond a specific instance of the data type.