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本书是C++初学者的入门经典读物。全书从4个方面来展现C++的本质：procedLJral(过程化的)、gerleric(泛型的)、object—based(基于对象的)、object—oriented(面向对象的)。本书的组织围绕着一系列由浅入深的程序设计问题，介绍了用以解决这些问题的语言特性。按照这种方式，读者不但能学到C++的函数和结构，还会学习到它们的设计目的和基本原理。本书涉猎范围广泛，内容涉及C++语言发展的主要几个方面，适合有一定基础的C++初学者。

所谓计算机网络就是利用通信设备和线路将地理位置不同、功能独立的多个计算机系统互连起来，并通过功能完善的网络软件实现网络中资源共享和信息传递的系统。

网络层是OSI参考模型中的第三层，介于运输层和数据链路层之间，它解决整个网络的数据通信，将数据设法从源端点经过若干的中间节点传送到目的端。

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