打算趁留在学校的最后一段时间好好补习一下一直以来都忽略掉的C/C++标准库，大概就是以头文件为单位了。以一个最简单的头文件入手，然后逐渐展开来……第一个头文件当然非assert.h莫属了。这个范例是i386-pc-mingw32中的GCC 4.5.0下包含的。

　　view sourceprint /*

　　* assert.h

　　* This file has no copyright assigned and is placed in the Public Domain.

　　* This file is a part of the mingw-runtime package.

　　* No warranty is given; refer to the file DISCLAIMER within the package.

　　*

　　* Define the assert macro for debug output.

　　*

　　*/

　　/* We should be able to include this file multiple times to allow the assert

　　macro to be enabled/disabled for different parts of code. So don't add a

　　header guard. */

　　#ifndef RC_INVOKED

　　/* All the headers include this file. */

　　#include <_mingw.h>

　　#undef assert

　　#ifdef __cplusplus

　　extern "C" {

　　#endif

　　#ifdef NDEBUG