Read e-book online Beginning C# 2008 Objects: From Concept to Code PDF

By Grant Palmer

ISBN-10: 1430210877

ISBN-13: 9781430210870

ISBN-10: 1430210885

ISBN-13: 9781430210887

Updated with the alterations to C#, Beginning C# 2008 items: From techniques to Code introduces whole newbies to C# coding perform with an effective methodological starting place written by means of critically–acclaimed specialists within the box, already authors of the best–selling Beginning C# Objects.

By development from first rules in object–oriented terminology, then advancing via software layout with Unified Modeling Language (UML) into functional examples, Beginning C# 2008 gadgets: From recommendations to Code offers a foundational advisor written from the point of view of 2 skilled, operating professionals on C#.

Working coders will enjoy the object–oriented forged of the booklet and its part on use–case modeling. this is often the publication to learn with the intention to deepen and enhance your latest expert improvement in C# with a watch in the direction of advancing out of natural coding work.

For the reader wishing to “simply examine C#”, this publication will supply precisely that. as well as directory code and syntax, Beginning C# 2008 items: From thoughts to Code additionally walks you thru the layout and architecting of a functioning C# program, exhibiting the “why” and the “how” of the advance judgements that cross into specialist C# coding.

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Additional info for Beginning C# 2008 Objects: From Concept to Code

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The compiler evaluates such expressions from innermost to outermost parentheses, left to right. Assuming that x, y, and z are declared and initialized as shown here: int x = 1; int y = 2; int z = 3; then the expression on the right side of the following assignment statement int answer = ((8 * (y + z)) + y) * x; would be evaluated piece by piece as follows: ((8 * (y + z)) + y) * x ((8 * 5) + y) * x (40 + y) * x 42 * x 42 In the absence of parentheses, certain operators take precedence over others in terms of when they will be applied in evaluating an expression.

For example, in the preceding ScopeDemo example, the variable cost is accessible inside the nested if statement code block that follows its declaration. Printing to the Screen Most applications communicate information to users by displaying messages via the application’s GUI. However, it is also useful at times to be able to display simple text messages to the CHAPTER 1 ■ A LITTLE TASTE OF C# command-line window from which we are running a program as a “quick and dirty” way of verifying that a program is working properly (you’ll learn how to run C# programs from the command line in Chapter 13).

As an example of the consequences of variable scope, let’s write a program called ScopeDemo, shown next. The ScopeDemo class declares three nested code blocks: one for the ScopeDemo class declaration, one for the Main method, and one as part of an if statement inside the body of the Main method. 05; // declare a variable inside the 'if' block // other details omitted... } // When the 'if' block exits, the variable 'discount' goes out of scope, // and is no longer recognized by the compiler. If we try to use it // in a subsequent statement, the compiler will generate an error.

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Beginning C# 2008 Objects: From Concept to Code by Grant Palmer


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