其中最奇妙的事情之一是，在几乎每个平台上都为计划要处理的每个库函数和系统调用都提供自己的声明，而不是包括标准的头文件。

One of these magics was, on nearly every platform, to provide its own declarations for every library function and system call it planned to use, rather than including the standard headers.

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调用应用程序提供的算法：C 运行时库函数 qsort 排序对象数组，但你必须提供比较函数。

To Invoke an Application-Supplied Algorithm The C runtime library function qsort sorts an array of objects, but you must supply the function that compares objects.

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