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A programmer's introduction to C# by Harvey M. Deitel, Paul J. Deitel, Jeffrey A. Listfield, Tem

By Harvey M. Deitel, Paul J. Deitel, Jeffrey A. Listfield, Tem R. Nieto, Cheryl H. Yaeger, Marina Zlatkina

Written as an creation to the hot C#, this consultant takes the skilled C programmer a couple of steps past the fundamentals. It covers items, information forms, and movement regulate, or even delves into a few history at the new Microsoft internet Frameworks surroundings. protecting in brain that this is often for these acquainted with C (and even Java), the e-book is going into a few of the complex positive aspects and enhancements present in this new language. It additionally deals a comparability among C#, C++, visible simple, and Java.

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Virtual means that when a call to a member function is made, the compiler should look at the real type of the object (not just the type of the reference), and call the appropriate function based on that type. 0F; // minimum charge. 75F)); } } The CalculateCharge() and TypeName() functions are now declared with the virtual keyword in the base class, and that’s all that the base class has to know. It needs no knowledge of the derived types, other than to know that each derived class can implement CalculateCharge() and TypeName(), if desired.

Because it is a static member function, it is called using the name of the class rather than the name of an instance of the class. ” Static Constructors Just as there can be other static members, there can be static constructors. A static constructor will be called before the first instance of an object is created and is useful to do setup work that needs to be done once. NET Runtime world, the user has no control over Note when the static constructor is called; the runtime only guarantees that it is called sometime after the start of the program and before the first instance of an object is created.

They can’t inherit from any other type (though they implicitly inherit from object), and other classes can’t inherit from them. A Point Struct In a graphics system, a value class could be used to encapsulate a point. WriteLine("Start: {0}", start); } } The x and y components of the Point can be accessed. In the Main() function, a Point is created using the new keyword. For value types, new creates an object on the stack and then calls the appropriate constructor.

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