构造函数和析构函数是面向对象程序设计中的难点。

The construction function and the destruction function are difficult parts in object-oriented programming design.

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并在软件设计中重点介绍了OOP(面向对象程序设计)的设计原理及实现方法。

And the theory and method of OOP is emphatically introduced during the software design.

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并用面向对象的程序设计方法，设计了实现点、线、面符号库的程序类结构。

And a structure of program class is also designed by means of Object_Oriented design.

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目前开发所需的系统软件或工具均支持面向对象的程序设计。

At present, the development of the necessary system software or tools to support object-oriented programming.

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目前开发所需的系统软件或工具均支持面向对象的程序设计。

At present, the development of the necessary system software or tools to support object-oriented programming.

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