21世纪C语言（影印版）

　　抛弃你对于C语言的那些陈旧观念吧。你应该重新学习这门编程语言，它早已改变了过去的面貌。在 《21世纪C语言（影印版）》中，你将了解到在其他C语言书籍中所缺失的那些最新技术。C语言不仅仅是现 代编程语言的基石，它本身也是一门现代语言，尤其适合于编写高效的、尖端的应用程序。你需要放弃那 些只有在大型机时代才有意义的旧习，转而选择相应的工具来使用这门改进的极其简单的语言。无论目前 你是哪门编程语言的拥护者，你都不得不承认C语言 也很出色。 《21世纪C语言（影印版）》的作者是克莱门斯。

　　（美）克莱门斯，Ben Klemens为布鲁金斯学会、世界银行、美国国家心理卫生研究所和美国政府编写统计分析和集约计算模型。他同时也为布鲁金斯学会和自由软件基金会工作来确保软件作者有权使用他们编写的软件。

Preface Part I．The Environment 1．SetYourself Up for Easy Compilation  Use a Package Manager  Compiling C with Windows  POSIX for Windows  Compiling C with POSIX  Compiling C Without POSIX  Which Way to the Library?  A Few of My Favorite Flags  Paths  Runtime Linking  Using Makefiles  Setting Variables  The Rules  Using Libraries from Source  Using Libraries from Source(Even if Your Sysadmin Doesn’t Want You To)  Compiling C Programs via Here Document  Include Header Files from the Command Line  The Unified Header  Here Documents  Compiling from stdin 2．Debug，Test，Document  Using a Debugger  GDB Variables  Print Your Structures  Using Valgrind to Check for Errors  Unit Testing  Using a Program as a Library  Coverage  Interweaving Documentation  Doxygen  Literate Code with CW’EB  Error Checking  What Is the User’s Involvement in the Error?  The Context in Which the User Is Working  How Should the Error Indication Be Returned? 3．PackagingYourProject  The Shell  Replacing Shell Commands with Their Outputs  Use the Shell’s for Loops to Operate on a Set of Files  TestforFiles  fc  Makefiles VS．Shell Scripts  Packaging Your Code with Autotools  An Autotools Demo  Describing the Makefile with makefile．am  The configure Script 4．VersionControI  Changes via diff  Git’s Objects  The Stash  Trees and Their Branches  Merging  The Rebase  Remote Repositories 5．PlayingNicewithOthers  The Process   Writing to Be Read by Nonnatives  The Wrapper Function  Smuggling Data Structures Across the Border  Linking  Python Host  Compiling and Linking   The Conditional Subdirectory for Automake  Distutils Backed with Autotools Part II．The Language 6．YOurPaIthePointer  Automatic，Static，and Manual Memory  Persistent State Variables  Pointers Without malloc  Structures Get Copied，Arrays Get Aliased  malloc and Memory—Twiddling  The Fault Is in Our Stars  All the Pointer Arithmetic You Need to Know 7．CSyntaxYouCanIgnore  Don’t Bother Explicitly Returning from main   Let Declarations Flow  Set Array Size at Runtime  Cast Less  Enums and Strings  Labels，gotos，switches，and breaks  gotO Considered  switch  Deprecate Float 8．Obstaclesand Oppounity  Cultivate Robust and Flourishing Macros  Preprocessor Tricks  Linkage with static and extem  Declare Externally Linked Elements Only in Header Files  The const Keyword  Noun—Adjective Form  Tension  Depth  The char const Issue 9．Text  Making String Handling Less Painful with asprintf  Security  Constant Strings  Extending Strings with asprintf  APean to strtok  Unicode  The Encoding for C Code  Unicode Libraries  The Sample Code 10．Better Structures  Compound Literals  Initialization via Compound Literals  Variadic Macros  Safely Terminated Lists  Foreach  Vectorize a Function  Designated Initializers  Initialize Arrays and Structs with Zeros  Typedefs Save the Day  A StyleNote  Return Multiple Items from a Function  Reporting Errors  Flexible Function Inputs  Declare Your Function．as printf-Style  Optional and Named Arguments  Polishing a Dull Function  The Void Pointer and the Structures It Points To  Functions with Generic Inputs  Generic Structures 11．Object-Oriented Programmingin C  What You Don’t Get(and Why You Won’t Miss It)  Scope  Overloaded with Operator Overloading  Extending Structures and Dictionaries  Extending a Structure  Implementing a Dictionary  Base Your Code on Pointers to Objects  Functions in Your Structs  Count References，  Example：A Substring Object  An Agent—Based Model of Group Formation 12．Libraries  GLib  POS．IX  Using mmap for Gigantic Data Sets  Easy Threading with Pthreads  The GNU Scientific Library  SQLite  The Queries libxml and cURL Epilogue Glossary Bibliography Index