C Programming Absolute Beginner's Guide de Greg Perry

C Programming Absolute Beginner's Guide: Absolute Beginner's Guides (Que)

Greg Perry

Dean Miller

C Programming Absolute Beginner's Guide is the fastest way to get comfortable and productive with C11. This friendly, practical book will help the reader do exactly what they want, one incredibly clear and easy step at a time. World-renowned tech tutorial author Greg Perry reveals C11's power, and helps the reader quickly take advantage of it. He provides step-by-step instructions for every task requiring more than one step, many code samples, and screenshots guiding through complex processes. This guide including how to organize a program, store and display data, and work with variables, operators, I/O, pointers, arrays, and functions. Perry presents updated information on the latest C compilers for Windows, OS X, and Linux, as well as valuable new material on C programming for mobile and game development.

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Introduction ...1 Who's This Book For? ... 2 What Makes This Book Different? ... 2 This Book's Design Elements ... 3 How Can I Have Fun with C? ... 4 What Do I Do Now? ... 4 Part I: Jumping Right In 1 What Is C Programming, and Why Should I Care? ...5 What Is a Program? ... 6 What You Need to Write C Programs ... 7 The Programming Process ...10 Using C ...11 2 Writing Your First C Program ...13 A Down-and-Dirty Chunk of Code ...14 The main() Function ...16 Kinds of Data ...17 Characters and C ...18 Numbers in C ...19 Wrapping Things Up with Another Example Program ...21 3 What Does This Do? Clarifying Your Code with Comments ...23 Commenting on Your Code ...24 Specifying Comments ...25 Whitespace ...27 A Second Style for Your Comments ...28 4 Your World Premiere-Putting Your Program's Results Up on the Screen ...31 How to Use printf() ...32 The Format of printf() ...32 Printing Strings ...33 Escape Sequences ...34 Conversion Characters ...36 Putting It All Together with a Code Example ...38 5 Adding Variables to Your Programs ...41 Kinds of Variables ...42 Naming Variables ...43 Defining Variables ...44 Storing Data in Variables ...45 6 Adding Words to Your Programs ...49 Understanding the String Terminator ...50 The Length of Strings ...51 Character Arrays: Lists of Characters ...52 Initializing Strings ... 54 7 Making Your Programs More Powerful with #include and #define ...57 Including Files ...58 Placing #include Directives ...60 Defining Constants ...60 Building a Header File and Program ...62 8 Interacting with Users ...65 Looking at scanf() ...66 Prompting for scanf()...66 Problems with scanf() ...68 Part II: Putting C to Work for You with Operators and Expressions 9 Crunching the Numbers-Letting C Handle Math for You ...73 Basic Arithmetic ...74 Order of Operators ...77 Break the Rules with Parentheses ...79 Assignments Everywhere ...80 10 Powering Up Your Variables with Assignments and Expressions ...83 Compound Assignment ...84 Watch That Order! ...88 Typecasting: Hollywood Could Take Lessons from C ...88 11 The Fork in the Road-Testing Data to Pick a Path ...91 Testing Data ...92 Using if ...93 Otherwise...: Using else ...96 12 Juggling Several Choices with Logical Operators ... 103 Getting Logical ...104 Avoiding the Negative ...109 The Order of Logical Operators ...111 13 A Bigger Bag of Tricks-Some More Operators for Your Programs ... 115 Goodbye if...else; Hello, Conditional ...116 The Small-Change Operators: ++ and -- ... 119 Sizing Up the Situation ...121 Part III: Fleshing Out Your Programs 14 Code Repeat-Using Loops to Save Time and Effort... 123 while We Repeat ...124 Using while ...125 Using do...while ...127 15 Looking for Another Way to Create Loops ... 131 for Repeat's Sake! ...132 Working with for ...134 16 Breaking in and out of Looped Code ... 141 Take a break ...142 Let's continue Working ...145 17 Making the case for the switch Statement ... 149 Making the switch ...151 break and switch...153 Efficiency Considerations ...154 18 Increasing Your Program's Output (and Input) ... 163 putchar() and getchar() ...164 The Newline Consideration ...167 A Little Faster: getch() ...169 19 Getting More from Your Strings ... 171 Character-Testing Functions ...172 Is the Case Correct? ...172 Case-Changing Functions...176 String Functions ...176 20 Advanced Math (for the Computer, Not You!) ... 181 Practicing Your Math ...182 Doing More Conversions ...183 Getting into Trig and Other Really Hard Stuff ...184 Getting Random ...187 Part IV: Managing Data with Your C Programs 21 Dealing with Arrays ... 193 Reviewing Arrays ...194 Putting Values in Arrays ...197 22 Searching Arrays ... 201 Filling Arrays ...202 Finders, Keepers ...202 23 Alphabetizing and Arranging Your Data ... 209 Putting Your House in Order: Sorting ...210 Faster Searches ...215 24 Solving the Mystery of Pointers ... 221 Memory Addresses ...222 Defining Pointer Variables ...222 Using the Dereferencing * ...225 25 Arrays and Pointers ... 231 Array Names Are Pointers ...232 Getting Down in the List ...233 Characters and Pointers ...234 Be Careful with Lengths ...234 Arrays of Pointers ...236 26 Maximizing Your Computer's Memory ... 243 Thinking of the Heap ...244 But Why Do I Need the Heap? ...245 How Do I Allocate the Heap? ...246 If There's Not Enough Heap Memory ...249 Freeing Heap Memory ...250 Multiple Allocations ...250 27 Setting Up Your Data with Structures ... 257 Defining a Structure ...258 Putting Data in Structure Variables ...262 Part V: Files and Functions 28 Saving Sequential Files to Your Computer ... 267 Disk Files...268 Opening a File ...268 Using Sequential Files ...270 29 Saving Random Files to Your Computer... 277 Opening Random Files ...278 Moving Around in a File ...279 30 Organizing Your Programs with Functions ... 285 Form Follows C Functions ...286 Local or Global?...290 31 Passing Variables to Your Functions ... 293 Passing Arguments ...294 Methods of Passing Arguments ...294 Passing by Value ...295 Passing by Address ...297 32 Returning Data from Your Functions ... 305 Returning Values ...306 The return Data Type ...309 One Last Step: Prototype ...309 Wrapping Things Up ...312 Appendixes A The ASCII Table ... 313 B The Draw Poker Program ... 319 9780789751980, TOC, 7/18/2013

Notă biografică

Greg Perry is a speaker and writer in both the programming and applications sides of computing. He is known for bringing programming topics down to the beginner's level. Perry has been a programmer and trainer for two decades. He received his first degree in computer science and then earned a Master's degree in corporate finance. Besides writing, he consults and lectures across the country, including at the acclaimed Software Development programming conferences. Perry is the author of more than 75 other computer books. In his spare time, he gives lectures on traveling in Italy, his second favorite place to be. ' Dean Miller is a writer and editor with more than 20 years of experience in both the publishing and licensed consumer product businesses. Over the years, he has created or helped shape a number of bestselling books and series, including Teach Yourself in 21 Days, Teach Yourself in 24 Hours, and the Unleashed series, all from Sams Publishing.

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