Beginning Object-Oriented Programming with C#

The ideal beginner's guide to C# and object-oriented
programming

Wrox beginners' guides have the perfect formula for getting
programming newcomers up and running. This one introduces beginners
to object-oriented programming using C# to demonstrate all of the
core constructs of this programming framework. Using real-world
situations, you'll discover how to create, test, and deliver your
programs and how to work with classes, arrays, collections, and all
the elements of object-oriented programming.

• Covers exactly what beginners, even those with no prior
  programming experience, need to know to understand object-oriented
  programming and start writing programs in C#

• Explains the advantages and disadvantages of C#, and tips for
  understanding C# syntax

• Explores properties, encapsulation, and classes; value data
  types; operands and operators; errors and debugging; variables; and
  reference types

• Shows how to use statement repetition and program loops,
  understand arrays and collections, and write your own classes

• Also covers inheritance and polymorphism

Beginning Object-Oriented Programming with C# uses the
tried-and-true Wrox formula for making this popular programming
method easy to learn.

Auteur

Jack Purdum, Ph.D., is an established author of more than a dozen programming books. Using his teaching experience as a professor of computer language instruction at Purdue University, he has identified common stumbling blocks for beginning programmers and knows how to teach concepts so readers can understand and code immediately.

Wrox Beginning guides are crafted to make learning programming languages and technologies easier than you think, providing a structured, tutorial format that will guide you through all the techniques involved.

Résumé
The ideal beginner's guide to C# and object-oriented programming

Wrox beginners' guides have the perfect formula for getting programming newcomers up and running. This one introduces beginners to object-oriented programming using C# to demonstrate all of the core constructs of this programming framework. Using real-world situations, you'll discover how to create, test, and deliver your programs and how to work with classes, arrays, collections, and all the elements of object-oriented programming.

• Covers exactly what beginners, even those with no prior programming experience, need to know to understand object-oriented programming and start writing programs in C#
• Explains the advantages and disadvantages of C#, and tips for understanding C# syntax
• Explores properties, encapsulation, and classes; value data types; operands and operators; errors and debugging; variables; and reference types
• Shows how to use statement repetition and program loops, understand arrays and collections, and write your own classes
• Also covers inheritance and polymorphism
  Beginning Object-Oriented Programming with C# uses the tried-and-true Wrox formula for making this popular programming method easy to learn.

Contenu
INTRODUCTION xxv PART I: GETTING STARTED

CHAPTER 1: INTRODUCING C# 3

A Short History of Object-Oriented Programming (OOP) 4

Installing C# 5

Downloading Visual Studio Professional 5

A Test Program Using C# 8

Creating a Project 9

The C# Integrated Development Environment 10

The Major IDE Windows 10

Using the Source Code Window 12

Adding a Toolbox Object to a Windows Form 13

Changing the Text of a Label Object 14

Running the Program 16

Summary 16

CHAPTER 2: UNDERSTANDING OBJECTS 19

Understanding Objects 20

Everyday Use of Objects 20

Class Properties 20

Class Methods 22

How Many Properties, How Many Methods? 23

Classes Are Simplifi cations of Objects 23

What Do I Do After I've Defi ned a Class? 23

Instantiating an Object of a Class 26

I Have an ObjectNow What? 29

Why Hide the Data Inside an Object? 32

Getting Started with Objects 32

Developing a Program Plan 38

Where to Start? The Five Program Steps 38

The Five Program Steps 38

Creating a Simple Application Using Objects 40

Using the Program Steps to Create a Program Plan 40

1: Initialization 40

2: Input 41

3: Process 42

4: Display 43

5: Termination 43

Using C# to Implement Your Program Plan 43

Critique of the btnDisplayOutput Click Event Code 53

Summary 54

PART II: UNDERSTANDING C# SYNTAX

CHAPTER 3: UNDERSTANDING DATA TYPES 59

Computer Data 59

Integer Data Types 60

Range of Integer Data Types 61

Understanding Binary Numbers 61

Signed Integer Values 62

Which Integer Should You Use? 62

Variable Naming Rules and Conventions 63

Floating-Point Data Types 71

Which Floating-Point Data Type Should You Use? 74

Monetary Values: The Decimal Data Type 74

Using IntelliSense to Locate Program Errors 76

Syntax Rules and Error Messages 76

The Boolean Data Type 77

Summary 79

CHAPTER 4: UNDERSTANDING C# STATEMENTS 81

Basic Building Blocks of a Programming Language 82

Operands and Operators 82

Expressions 83

Statements 83

Operator Precedence 84

Overriding the Default Precedence Order 85

Defi ning Variables 87

Defi ning a Variable from the Compiler's Point of View 87

Step 1: Preliminary Syntax Checking 87

Step 2: Symbol Table Checking 87

Step 3: Defi ning a Variable 89

Using a Variable in a Program 90

Bucket Analogy 91

Types of Program Errors 93

Syntax Errors 93

Semantic Errors 93

Logic Errors 94

The Visual Studio Debugger 94

The Debugging Process 94

Making Repetitious Debugging Easier 95

Using the Visual Studio Debugger 97

Setting a Breakpoint 97

Using a Breakpoint to Examine Variables 98

Single-Stepping the Program 100

Defensive Coding 101

Write Your Code So That Someone Else Can Easily Understand It 101

Use Program Comments 101

Use Meaningful Variable Names 103

Avoid Magic Numbers 104

Use a Consistent Coding Style 105

Take a Break 105

Use a Second Set of Eyes 105

Summary 106

CHAPTER 5: UNDERSTANDING REFERENCE DATA TYPES 109

String Variables 110

Defi ning a String Reference Variable 110

The Meaning of null 111

Why Reference Types Are Diff erent from Value Types 113

Reference Variable Rules 113

Reference Type Variables Versus Value Type Variables 115

Why Do Reference Variables Work the Way They Do? 115

Pass by Value Versus Pass by Reference 116 &lt...