Friend對物件導向程式之破壞

What Damage the Object-Oriented Program by Friendship

周沛宇(Pei-Wu Chou)

指導教授 ： 林金城

大同大學/電機資訊學院/資訊工程學系所/碩士(2009年)

摘要

物件導向程式語言的特性有封裝、繼承及多型，而繼承及多型所產生的錯誤非常難以追蹤。friend是C++所特有的語法，friend結構會破壞物件導向程式語言所擁有的優勢，使得程式變得更複雜。在本篇論文中將討論friend對C++程式語言的破壞，並將這些錯誤加以研究，且將現有對friend的誤解一一討論。在論文的最後提出一個初步在設計階段用來預估物件導向多型加入friend設計上的缺陷，給予開發者早期設計資以修改設計或是尋找其他的解決的方案。

關鍵字

多型 ； 繼承 ； 封裝 ； 物件導向程式語言 ； friend

並列摘要

Object-oriented programming language. Friend keyword is a special syntax only in C++. Friend construct in C++ programming language is a violation of encapsulation, that will made default program become more and more difficult and complex. This paper will discuss how friend destroy the C++ programming language, and investigate this fault. Discuss the misunderstand of friend. This paper provide an estimating the polymorphism defects in design stage with friend. This metric can provide early information for developer on modify, redesign the system and find another way to fix these defect as will.

並列關鍵字

Object-Oriented programming language ； Inheritanc

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