C Tips: stdbool.h

下面是来自 cprogramming.com 的 stdbool.h 的定义：

#ifndef STDBOOL_H_#define STDBOOL_H_ /** * stdbool.h - ISO C99 Boolean type * Author    - Bill Chatfield * E-mail    - bill underscore chatfield at yahoo dot com * Copyright - You are free to use for any purpose except illegal acts * Warrenty  - None: don't blame me if it breaks something * * In ISO C99, stdbool.h is a standard header and _Bool is a keyword, but * some compilers don't offer these yet. This header file is an  * implementation of the standard ISO C99 stdbool.h header file. It checks * for various compiler versions and defines things that are missing in * those versions. * * The GNU and Watcom compilers include a stdbool.h, but the Borland * C/C++ 5.5.1 compiler and the Microsoft compilers do not. *  * See http://predef.sourceforge.net/precomp.html for compile macros. */ /** * Borland C++ 5.5.1 does not define _Bool. */#ifdef __BORLANDC__typedef int _Bool;#endif /** * Microsoft C/C++ version 14.00.50727.762, which comes with Visual C++ 2005, * and version 15.00.30729.01, which comes with Visual C++ 2008, do not  * define _Bool. */#if defined(_MSC_VER) && _MSC_VER <= 1500typedef int _Bool;#endif /** * Define the Boolean macros only if they are not already defined. */#ifndef __bool_true_false_are_defined#define bool _Bool#define false 0 #define true 1#define __bool_true_false_are_defined 1#endif #endif /*STDBOOL_H_*/

但是上述文件在 Visual Studio 2012 中不工作。

下面是我自己写的 stdbool.h 的定义：

#ifndef STDBOOL_H_#define STDBOOL_H_/** * stdbool.h * Author    - Yaping Xin * E-mail    - xinyp at live dot com * Copyright - You are free to use for any purpose except illegal acts * Warrenty  - None: don't blame me if it breaks something * * In ISO C99, stdbool.h is a standard header and _Bool is a keyword, but * some compilers don't offer these yet. This header file is an  * implementation of the stdbool.h header file. * */#ifndef _Booltypedef unsigned char _Bool;#endif /* _Bool */ /** * Define the Boolean macros only if they are not already defined. */#ifndef __bool_true_false_are_defined#define bool _Bool#define false 0 #define true 1#define __bool_true_false_are_defined 1#endif /* __bool_true_false_are_defined */ #endif /* STDBOOL_H_ */

参考链接：

• stdbool.h in Visual Studio C++ Express 2008 ( standard C code) http://cboard.cprogramming.com/c-programming/138189-stdbool-h-visual-studio-cplusplus-express-2008-standard-c-code.html
  
• Boolean data type http://en.wikipedia.org/wiki/Boolean_data_type#C99
  
• Where is stdbool.h? http://stackoverflow.com/questions/1656874/where-is-stdbool-h