Issues in porting software from c to c++

This paper describes an experiment in the development of a small piece of software in both the languages C and C++ in a university setting. The C++ codes were found to be more modular than the corresponding C codes. Some of the other effects of C++ on program quality are very briefly discussed. The paper also discusses some of the errors that C programmers may make as novice C++ programmers, and the testing of object-oriented programs. Some of the error types possible in C++, but not in C, include delays in the flushing of output buffers and polymorphism.     

基于窗口的面向对象的GUI设计

文中讨论了一种基于窗口的对象用户界面设计思想及方法，详细描述了各种类的定义。在ＤＯＳ环境下运用ＷａｔｃｏｍＣ＋＋语言在微机上开发运行。它可以使用户方便地进行再开发工作，界面运用事件处理方式由窗口、弹出菜单、图标、按钮等组成。效果良好。     

基于ODMG—93标准的面向对象视图集成机制

模式集成多数据库系统中需要解决的关键问题之一，己存在的大多数面向多数据库系统都采用了面向对象视图机制来建立集成模式。为了满足基于ＣＯＲＢＡ的ＣＩＭＳ信息集成平台呆订成的需要，本文提出了一种基于数据库管理组ＯＤＭＧ的ＯＤＭＧ－９３标准的视图集成机制并通过一个完整的例子说明了这种视图机制在模式集成中的应用。     

An object design framework for structural engineering

Object-oriented principles have introduced several useful concepts for developing complex software systems. As a result, several methodologies have been suggested for the overall design of software systems based on these concepts. Methodologies and frameworks for designing objects that are to be part of the software systems are currently lacking. This paper proposes anobject design framework andmethodology, which utilizes the object-oriented concepts, for planning, organizing and designing structural engineering design objects. Design objects in an integrated structural engineering system are complex and often related to each other in various different ways. The paper also identifies several important relationships among structural engineering design objects. These relationships serve as communication channels through wich design objects send messages to and receive responses from each other. Several examples, drawn from reinforced concrete structures, will be presented to demonstrate the object design methodology and to illustrate how the framework is effective in reducing the complexity of design objects in an integrated structural engineering system.     

Object-extending class transformations

Reorganisation and evolution of class hierarchies is important for object-oriented system development and has received considerable attention in the literature. The contributions of this paper are: (1) a formal study of a set of extension relations and transformations on class hierarchies; (2) a presentation of a small set of primitive transformations which form a minimal and complete basis for the extension relations; and (3) an analysis of the impact of these transformations at the object level.The study leads to a better understanding of evolution and reuse of object-oriented software and class hierarchies. It also provides a terminology and a means of classification for design reuse. The theory presented in this paper is based on the Demeter data model, which gives a concise mathematical foundation for classes and their inheritance and part-of relationships. Parts of the theory have been implemented in the Demeter System ^TM C++, a CASE tool for object-oriented design and programming.     

通用绘图软件NuSlides中的面向对象的用户界面设计

本文描述在Ｕｎｉｘ环境下开发的通用绘图软件ＮｕＳｌｉｄｅ中的图形用户界面的设计思想和实际方法。其特点是基子面向对象的技术，提供多窗口、菜单驱动、选择面板、键盘输入等多种才法。该图形用户界面具有灵活性、可扩充性和易使用性。     

Class Based Contextual Logic for DOOD

Cntextual logic provides a mechanism to reason about modules.In this paper,this theory of modules if modules is extended to a context theory of classes where class is in the true spirit of object-oriented databases.The logic,referred to as CLOG,is class-based.CLOG supports class,object identity,multiple role of object, monotonic and non-monotonic inheritance of data and method,method factoring,views,derived and query classes.Views and derived classes are queries in themselves.Objects are pure data terms representing the ground instances of facts in the class.Object identity is a first class term in the logic.Inheritance is handled through delegation.     

Object-oriented task analysis

The object-oriented approach has recently received much attention in MIS development. However, as yet little research has been reported on task analysis in the object-oriented paradigm. This paper describes an object-oriented method for task analysis. Three fundamental types of objects (task, user, and interface) engaged in task analysis are described. The association between these objects is then built through identifying the messages between the objects. A practical application of this method shows that it is useful for the analysis and design of a human-computer interface.     

变速箱结构设计专家系统技术的研究

结构设计是机械产品设计过程中的重要环节，解决结构设计的智能化不但可以缩短产品的设计周期，而且还可以降低成本，提高设计质量。专家系统是解决智能化设计的技术之一。本文讨论有关结构专家系统的几个关键技术，主要包括系统的控制策略，面积对象的知识表达方式及结构设计的并行设计