Analysis of Object-Oriented Software Engineering

In order to solve the software crisis, some it predecessors proposed the term software engineering, which is the general process of introducing software development to maintenance. From the perspective of program design, software engineering can be divided into two types: Structure-oriented software engineering and object-oriented software engineering. Next, let's take a macro look at the object-oriented software engineering, and further explain the object-oriented analysis.

1. Object-Oriented Software Engineering Map

Object-oriented software engineering can be divided into five stages: 1. Oo analysis; 2. OO design; 3. OO programming; 4. Oo testing; 5. Oo maintenance.

2. Object-Oriented Analysis

Iii. Illustration

To develop software using object-oriented methods, we usually need to establish three forms of models: describes the object model of the system data structure, the dynamic model that describes the system control structure, and the functional model that describes the system functions. If the three models represent the steps for doing one thing, then the object model represents who to do it? When does the function model represent? What does a dynamic model mean?

Objects, classes, and themes in the object model describe two different levels of abstraction. objects are abstracted into classes, classes are abstracted into topics, and then the associations and attributes are found, finally, optimization is in progress.

The core of the dynamic model is the event tracking diagram and the object state diagram, which indicate that "one thing to do" is the transmission direction and status of the information flow. In the dynamic model, you need to write a script to describe the action sequence of each dynamic interaction process, and construct an interface for user interaction so that users can input information.

The functional model indicates what to do. In the three models, the object model is the basis, and we are constantly optimizing the three models, this is equivalent to review at every stage of the structure design.

Iv. Summary

The key to object-oriented analysis is to find out the objects in the problem domain, analyze the relationships between them, and finally establish a concise, accurate, and understandable correct model of the problem domain. Object-Oriented Programming is an "Upgrade" relative to structured programming ". The purpose of object-oriented is to make the code more readable, maintainability, and scalable. This reduces the workload of software development and maintenance and saves us a lot of time.

Analysis of Object-Oriented Software Engineering