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.
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.
在应用程序设计和开发过程中常常使用这些对象。
These objects are used frequently during the application design and development process.
在应用程序设计过程中，将大量使用这些对象。
These objects are used heavily during the application design process.
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.
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.
元程序设计系统是一种以程序作为操作对象的有效的程序设计工具，并具有广泛的应用。
Metaprogramming system is an efficient design tool which operates to program and has many applications.
元程序设计系统是一种以程序作为操作对象的有效的程序设计工具，并具有广泛的应用。
Metaprogramming system is an efficient design tool which operates to program and has many applications.
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