软硬件系统编程PPT (39).pdf

《软硬件系统编程PPT (39).pdf》由会员分享，可在线阅读，更多相关《软硬件系统编程PPT (39).pdf（11页珍藏版）》请在淘文阁 - 分享文档赚钱的网站上搜索。

1、The overview of software development process-General Solution Procedure of Computer General Solution Procedure of Human 1.Evaluating whether this problem can be solved；2.How to solve it?The solution may be found immediately for a simple problem.For a complex problem,it may be necessary to split the

2、task into different sub-tasks.and finish it with the help of more than one person.3.Find a specific way to solve each sub task and finish it.4.Summarize the solution results of all sub tasks to form the final result.5.Finally,we need to identify the correctness of problem solving.2 General Solution

3、Procedure of Computer It includes the following activities Requirement analysis Design Implementation Testing 3 Software development process Analysed&Abstracted Realty problem Modeling Structure designed Algorithm designed Design requirement analysis Implementation Testing&Maintenance The software d

4、evelopment process Coding Model analysed Testing&Maintenance Results What need to be done?About requirements analysis Gather,analyze,and validate the information;Evaluation and the alternatives and prioritize the requirements；Modeling;A Software Requirement Specification document.5 The requirement a

5、nalysis is to solve what to do Understand business need and processing needs.For example Requirement description of student record management system Determine which roles(objects)should be in the system Determine the main functions of the system(what should be done)Determine the properties of each o

6、bject and their relationship with each other.Determine the functional boundary of the system,input and output of the system,etc.6 7 Use Case modeling The relationship between role(object)and function Case(function)Role(Object)EntityEntity Property RelationshipRelationship The E-R Model of student re

7、cord management system m n The main tasks of DESIGN are Divide complex problems into specific sub-tasks(Module)Define the function of each module,relationship between modules,interface,.Design algorithm.9 System design is the process of gradually refinement from top to bottom.Define solution system

8、based on requirement and analysis decision System design is to solve“how to do Imlpementation,Testing&Maintenance Coding is programming by a program language Debugging is to diagnose and correct possible grammar mistakes and logic errors in a program Testing is the process of executing a program to

9、find mistakes.It checks the correctness of the system according to the documents of each stage in Software System Development Life Cycle.10 Implementation is the design into source code through programming based on the“correct method.It involved coding and debugging.Attention please Software System Development has Life Cycle.Software is not just program,it contains the programs,data of program running,and its related documents.