摘要： 可重用软件有着一系列的收益——降低软件系统的开销,增强软件的可靠性,增强易于维护性以及提高软件系统的质量。本文讨论可重用模块,即抽象数据类型的Ada实现。本文首先论述了该研究领域的重要性;尔后叙述了Ada语言对支撑可重用模块所具备的种种机制;最后给出Ada语言编制的一个可重用模块的模式。

Abstract: The reuse of software has a number of payoffs ---reduction of costs, increased reliability, easier maintenance and enhanced software system. The paper presents reusable modules, that is, implementation of abstract data types in Ada. First, the importance to study in this area is explained: then the mechanism of Ada is discussed, which can be used to support reusable modules; and finally, the model of reusable modules in Ada is given.