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This document assumes you have done object-oriented programming in C++ or Java and are following along in class as we present motivation, details and applications. This is only a sketch of some of the highlights of C#, emphasizing its distinctive features. C# is new, and there is no brief, high-quality book available yet. Procedural Programming Aspects. The built-in value types come from the .NET Common Type System (shared by Visual Basic .NET, etc). They can be referred to by their .NET type names or their C#-specific aliases. By definition, the name of a value type names the value directly. So, for example, if a and b are ints, then a == b tests whether these two ints are equal (as you’d expect), not –of course– whether a and b refer to the very same integer object in memory. The System.String type is aliased to string in C#. Strings are immutable reference types, but with == overloaded to compare string contents rather than references. [“Immutable” means that a string object cannot be changed once constructed. “Reference type” means that names of strings actually name references to string objects on the heap; string variables can be null. All objects on the heap are garbage-collected.] ADT Programming Aspects Structs are user-defined value types suited for small bundles of data. They cannot be subtypes or supertypes of other programmer-defined classes. Otherwise, they can have most of the features of classes (see next section), but in practice they tend to be much simpler.
Tags : string variables, object oriented programming, programming aspects, integer object, c strings, object oriented programming in c, procedural programming, quality book, type names, string object, compact guide, distinctive features, programming in c, string type, adt
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