假定读者至少在一种计算机语言中具有一些先前的编程经验，并熟悉基本的概念，如数据类型、流程控制和函数。
It is assumed that readers have some previous programming experience in at least one computer language and are familiar with basic concepts such as data types, flow control, and functions.
移植性：C语言的核心以及ANSI函数调用都具有移植性，但仅限于流程控制、内存管理和简单的文件处理。
Portability: While the core of the language and the ANSI function calls are very portable, they are limited to control-flow, memory management, and simple file-handling.
移植性：C语言的核心以及ANSI函数调用都具有移植性，但仅限于流程控制、内存管理和简单的文件处理。
Portability: While the core of the language and the ANSI function calls are very portable, they are limited to control-flow, memory management, and simple file-handling.
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