电子文档交易市场
安卓APP | ios版本
电子文档交易市场
安卓APP | ios版本

uml课件Lect1-Evolution Object Model-Unified Process

73页
  • 卖家[上传人]:豆浆
  • 文档编号:51006707
  • 上传时间:2018-08-12
  • 文档格式:PPT
  • 文档大小:1.76MB
  • / 73 举报 版权申诉 马上下载
  • 文本预览
  • 下载提示
  • 常见问题
    • 1、Lecture 1. Lecture 1. The Evolution of the Object Model and Unified Development Unified Development ProcessProcessObject Oriented Technology and System Modeling面向对象技术与系统建模 Instructor: Yushan Sun Spring Term 2013内容提要: 1. The Evolution of the Object Model 面向对象模型的进化(Grady Booch Book 2.1) 2. Review of Earlier Software Development Models 早期软件开发模型回顾 (Mark Priestley Book) 3. 3. The Unified Process The Unified Process 统一过程模型统一过程模型 (Mark Priestley Book) 4. The Use of UML in the Unified Process1. The Evol

      2、ution of the Object Model (Grad Book 2.1) 面向对象开发 继承了 其它 语言的 精髓 OO development is not a radical departure from earlier approaches. Indeed, it is founded in the best ideas from prior technologies. 本节研究编程语言的进化,以便理解面向对象技 术 In this section, we will examine the evolution of the programming languages to help us understand the foundation and emergence of OO technology. 从历史上看,我们注意到两种潮流:从小规模编 程到大规模编程的转变;高级编程语言的进化 As we look back on the history of software engineering. We notice two sweeping trends: The sh

      3、ift in focus from programming-in-the- small to programming-in-the-large The evolution of high-order programming languages 大多数工业软件系统都比较大且复杂 Most new industrial-strength software systems are larger and more complex than their predecessors were even just a few years ago. The Generations of Programming Languages 编程语言的断代 Programming languages generations are arranged according to the language features they first introduced First-generation languages (19541958) FORTRAN I: Mathematical expressions ALGO

      4、L 58: Mathematical expressions 特点:数学表达式;科学、工程 Second-generation languages (19591961) FORTRAN II: Subroutines, separate compilation ALGOL 60: Block structure, data types COBOL: Data description, file handling 特点:算法抽象(子程序),文件处理,商业应 用000100 IDENTIFICATION DIVISION. 000200 PROGRAM-ID. HAPPYNEWYEAR. 000300 100000 PROCEDURE DIVISION. 100100 100200 MAIN-LOGIC SECTION. 100300 BEGIN. 100400 DISPLAY “ “ LINE 1 POSITION 1 ERASE EOS. 100500 DISPLAY “Happy New Year!“ LINE 15 POSITION 10 100600 STOP RUN. 1007

      5、00 MAIN-LOGIC-EXIT. 100800 EXIT. The following is a piece of simple COBOL code,to show the features of unstructured programming.所有代码都写在一个文件中。分成几段:包括过程区、主逻辑区等过程区主逻辑区 Third-generation languages (19621970) PL/1: FORTRAN + ALGOL + COBOL ALGOL 68: Rigorous successor to ALGOL 60 Pascal: Simple successor to ALGOL 60 Simula: Classes, data abstraction 特点:支持数据抽象 The generation gap (19701980) Many different languages were invented, but few endured. However, the following are worth noting: C: efficient; sma

      6、ll executables (1973 AT heavy Pascal influence 特点:支持面向对象编程、设计、分析 Emergence of frameworks (1990today) Much language activity, revisions, and standardization have occurred, leading to programming frameworks. Visual Basic: Eased development of the graphical user interface J2EE: Java-based framework for enterprise computing .NET: Microsofts object-based framework 特点:支持大规模软件开发Topology of 1st-and Early 2nd-Generation Languages (第1代第2代早期语言的拓扑结构) In Fig 2-1, we see the topology of most 1st- and early 2n

      7、d-generation programming languages. By topology, we mean the basic physical building blocks of the language and how those parts can be connected. FORTRAN 和 COBOL语言的基本建筑块是子程 序 In this figure, we see that, for languages such as FORTRAN and COBOL, the basic physical building block of all applications is the subprogram.Figure 21 The Topology of First- and Early Second-Generation Programming Languagessubprogramsglobal data子程序子程序子程序子程序箭头 代表 依赖扁平的物理结构 : 1)全局变量 2)子程序 扁平结构设计 Applications written in these

      8、 languages exhibit a relatively flat physical structure, consisting only of global data and subprograms. 缺点1:程序缺陷引起波浪传导效应;主要是全 局变量可以被任何代码修改 An error in one part of a program can have a devastating ripple effect across the rest of the system because the global data structures are exposed for all subprograms to see. 缺点2:当大系统需要修改的时候,很难保持原 设计的完整性 When modifications are made to a large system, it is difficult to maintain the integrity of the original designTopology of Late 2nd- Early 3rd - Generation

      9、 Languages (第2代后期第3代早期语言的拓扑结 构) 在60年代中期,抽象被认为是问题与计算机的中介 By the mid-1960s, programs were being recognized as important intermediate points between the problem and the computer. 最早的软件抽象: 过程抽象(出于实用的目的);子程 序没有被看成是抽象,而仅仅视为一种省力的手段; The first software abstraction, now called the procedural abstraction, grew out of this pragmatic view of software. Originally, subprograms were not appreciated as abstractions. Instead, they were seen as labor- saving devices. 很快地,人们开始珍视为抽象的程序功能 Very quickly, subprograms were appreciated as a way to abstract program functions. 将子程序作为抽象机制的3个后果 Using subprograms as an abstraction mechanism had three important consequences. 1) 支持参数传递机制语言产生了Languages were invented that supported a variety of parameter-passing mechanisms. 2) 奠定了结构化编程的基础The foundations of structured progr

      《uml课件Lect1-Evolution Object Model-Unified Process》由会员豆浆分享,可在线阅读,更多相关《uml课件Lect1-Evolution Object Model-Unified Process》请在金锄头文库上搜索。

      点击阅读更多内容
    最新标签
    发车时刻表 长途客运 入党志愿书填写模板精品 庆祝建党101周年多体裁诗歌朗诵素材汇编10篇唯一微庆祝 智能家居系统本科论文 心得感悟 雁楠中学 20230513224122 2022 公安主题党日 部编版四年级第三单元综合性学习课件 机关事务中心2022年全面依法治区工作总结及来年工作安排 入党积极分子自我推荐 世界水日ppt 关于构建更高水平的全民健身公共服务体系的意见 空气单元分析 哈里德课件 2022年乡村振兴驻村工作计划 空气教材分析 五年级下册科学教材分析 退役军人事务局季度工作总结 集装箱房合同 2021年财务报表 2022年继续教育公需课 2022年公需课 2022年日历每月一张 名词性从句在写作中的应用 局域网技术与局域网组建 施工网格 薪资体系 运维实施方案 硫酸安全技术 柔韧训练 既有居住建筑节能改造技术规程 建筑工地疫情防控 大型工程技术风险 磷酸二氢钾 2022年小学三年级语文下册教学总结例文 少儿美术-小花 2022年环保倡议书模板六篇 2022年监理辞职报告精选 2022年畅想未来记叙文精品 企业信息化建设与管理课程实验指导书范本 草房子读后感-第1篇 小数乘整数教学PPT课件人教版五年级数学上册 2022年教师个人工作计划范本-工作计划 国学小名士经典诵读电视大赛观后感诵读经典传承美德 医疗质量管理制度 2 2022年小学体育教师学期工作总结 2022年家长会心得体会集合15篇
    关于金锄头网 - 版权申诉 - 免责声明 - 诚邀英才 - 联系我们
    手机版 | 川公网安备 51140202000112号 | 经营许可证(蜀ICP备13022795号)
    ©2008-2016 by Sichuan Goldhoe Inc. All Rights Reserved.