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Objectives Overview. See Page 663 for Detailed Objectives. Objectives Overview. See Page 663 for Detailed Objectives. Computer Programs and Programming Languages. A computer program is a series of instructions that directs a computer to perform tasks

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Objectives overview
Objectives Overview

See Page 663

for Detailed Objectives

Discovering Computers 2011: Living in a Digital World Chapter 13


Objectives overview1
Objectives Overview

See Page 663

for Detailed Objectives

Discovering Computers 2011: Living in a Digital World Chapter 13


Computer programs and programming languages
Computer Programs and Programming Languages

  • A computer programis a series of instructions that directs a computer to perform tasks

    • Created by a programmerusing a programming language

Pages 664 – 665

Figure 13-1

Discovering Computers 2011: Living in a Digital World Chapter 13


Low level languages
Low-Level Languages

  • Machine languageis the first generation of programming languages

  • Only language the computer directly recognizes

Page 665

Figure 13-2

Discovering Computers 2011: Living in a Digital World Chapter 13


Low level languages1
Low-Level Languages

  • Assembly languageis the second generation of programming languages

  • Programmer writes instructions using symbolic instruction codes

  • A source programcontains the code to be converted to machine language

Pages 665 – 666

Figure 13-3

Discovering Computers 2011: Living in a Digital World Chapter 13


Procedural languages
Procedural Languages

  • In a procedural language, the programmer writes instructions that tell the computer what to accomplish and how to do it

    • Third-generation language(3GL)

Pages 666 - 667

Discovering Computers 2011: Living in a Digital World Chapter 13


Procedural languages1
Procedural Languages

Page 667

Figures 13-4 – 13-5

Discovering Computers 2011: Living in a Digital World Chapter 13


Procedural languages2
Procedural Languages

  • The C programming language is used to write many of today’s programs

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click C below Chapter 13

Page 668

Figure 13-6

Discovering Computers 2011: Living in a Digital World Chapter 13


Procedural languages3
Procedural Languages

  • COBOL (COmmon Business-Oriented Language) is designed for business applications, but easy to read because of the English-like statements

Pages 668 – 669

Figure 13-7

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools
Object-Oriented Programming Languages and Program Development Tools

  • An object-oriented programming (OOP) languageallows programmers the ability to reuse and modify existing objects

  • Other advantages include:

Page 669

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools1
Object-Oriented Programming Languages and Program Development Tools

  • Javais an object-oriented programming language developed by Sun Microsystems

  • The Just-in-time (JIT) compiler to convert the bytecode into machine-dependent code

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Java Platforms below Chapter 13

Page 670

Figure 13-8

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools2
Object-Oriented Programming Languages and Program Development Tools

  • The Microsoft .NETFramework allows almost any type of program to run on the Internet or an internal business network, as well as computers and mobile devices

  • Features include:

Page 670

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools3
Object-Oriented Programming Languages and Program Development Tools

  • C++is an extension of the C programming language

  • C# is based on C++ and was developed by Microsoft

  • F# combines the benefits of an object-oriented language with those of a functional language

Page 671

Figure 13-9

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools4
Object-Oriented Programming Languages and Program Development Tools

Pages 671 - 673

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools5
Object-Oriented Programming Languages and Program Development Tools

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Visual Studio Tools for Officebelow Chapter 13

Pages 671 – 672

Figure 13-10

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools6
Object-Oriented Programming Languages and Program Development Tools

Page 673

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools7
Object-Oriented Programming Languages and Program Development Tools

Page 673

Figure 13-11

Discovering Computers 2011: Living in a Digital World Chapter 13


Object oriented programming languages and program development tools8
Object-Oriented Programming Languages and Program Development Tools

  • PowerBuilder is a powerful program development RAD tool

  • Best suited for Web-based, .NET, and large-scale enterprise object-oriented applications

Page 674

Figure 13-12

Discovering Computers 2011: Living in a Digital World Chapter 13


Other programming languages and development tools
Other Programming Languages and Development Tools

  • A 4GL (fourth-generation language) is a nonprocedural languagethat enables users and programmers to access data in a database

    • One popular 4GL is SQL

Page 674

Figure 13-13

Discovering Computers 2011: Living in a Digital World Chapter 13


Other programming languages and development tools1
Other Programming Languages and Development Tools

  • Classic programming languages include:

Page 675

Figure 13-14

Discovering Computers 2011: Living in a Digital World Chapter 13


Other programming languages and development tools2
Other Programming Languages and Development Tools

  • An application generatoris a program that creates source code or machine code from a specification of the required functionality

    • Often bundled as part of a DBMS

Page 676

Figure 13-15

Discovering Computers 2011: Living in a Digital World Chapter 13


Other programming languages and development tools3
Other Programming Languages and Development Tools

  • A macro is a series of statements that instructs an application how to complete a task

  • You usually create the macro in one of two ways:

    • Record the macro with a macro recorder

    • Write the macro

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Macros below Chapter 13

Pages 676 - 677

Discovering Computers 2011: Living in a Digital World Chapter 13


Other programming languages and development tools4
Other Programming Languages and Development Tools

Page 677

Figure 13-16

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development
Web Page Development

  • HTML is a special formatting language that programmers use to format documents for display on the Web

  • XHTML is a markup language that allows Web sites to be displayed more easily on mobile devices

Page 678

Figure 13-17

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development1
Web Page Development

  • XML allows Web developers to create customized tags and use predefined tags to display content appropriately on various devices

    • WML is a subset of XML and is used to design pages for microbrowsers

  • Two applications of XML are RSS 2.0 and ATOM

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click XML below Chapter 13

Page 679

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development2
Web Page Development

Page 679

Figure 13-18

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development3
Web Page Development

  • Web browsers can execute short programs to add interactive elements to Web pages

  • To send and receive information between your computer and a Web server, these programs use the CGI (common gateway interface)

Page 680

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development4
Web Page Development

Page 681

Figure 13-19

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development5
Web Page Development

  • Programmers write scripts, applets, servlets, or ActiveX controls using a variety of languages

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click PHP below Chapter 13

Pages 682 - 683

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development6
Web Page Development

Page 682

Figure 13-20

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development7
Web Page Development

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Cascading Style Sheetsbelow Chapter 13

Page 683

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development8
Web Page Development

  • Web 2.0 allows Web sites to provide a means for users to:

Page 684

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development9
Web Page Development

  • Most Web 2.0 sites use APIs

    • An API enables programmers to interact with an environment such as a Web site or operating system

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click APIs below Chapter 13

Page 684

Figure 13-21

Discovering Computers 2011: Living in a Digital World Chapter 13


Web page development10
Web Page Development

  • Web page authoring softwarecan create sophisticated Web pages that include images, video, audio, animation, and other effects

Page 685

Discovering Computers 2011: Living in a Digital World Chapter 13


Multimedia program development
Multimedia Program Development

  • Multimedia authoring software allows programmers to combine text, graphics, animation, audio, and video in an interactive presentation

Page 685

Discovering Computers 2011: Living in a Digital World Chapter 13


Multimedia program development1
Multimedia Program Development

Page 685

Figure 13-22

Discovering Computers 2011: Living in a Digital World Chapter 13


Program development
Program Development

  • Program developmentconsists of a series of steps programmers use to build computer programs

Page 686

Figure 13-23

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 1 analyze requirements
Step 1 – Analyze Requirements

  • To initiate program development, programmer:

    • Reviews the requirements

    • Meets with the systems analyst and users

    • Identifies input, processing, and output

      • IPO chart

Page 687

Figure 13-24

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution
Step 2 – Design Solution

  • Design a solution algorithm

  • In structured design, the programmer typically begins with a general design and moves toward a more detailed design

  • Programmers use a hierarchy chart to show program modules graphically

Pages 687 - 688

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution1
Step 2 – Design Solution

Page 688

Figure 13-25

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution2
Step 2 – Design Solution

  • With object-oriented (OO) design, the programmer packages the data and the program into a single object

    • Encapsulation

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Object-Oriented Designbelow Chapter 13

Page 689

Figure 13-26

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution3
Step 2 – Design Solution

  • The sequence control structure shows one or more actions following each other in order

Page 689

Figure 13-27

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution4
Step 2 – Design Solution

  • The selection control structure tells the program which action to take, based on a certain condition

    • If-then-else

    • Case

Page 689

Figure 13-28

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution5
Step 2 – Design Solution

Page 690

Figure 13-29

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution6
Step 2 – Design Solution

  • The repetition control structure enables a program to perform one or more actions repeatedly as long as a certain condition is met

Page 690

Figures 13-30 – 13-31

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution7
Step 2 – Design Solution

  • A program flowchart graphically shows the logic in a solution algorithm

Page 691

Figure 13-33

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution8
Step 2 – Design Solution

  • Flowcharting softwaremakes it easy to modify and update flowcharts

    • SmartDraw

    • Visio

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Flowcharting Softwarebelow Chapter 13

Page 692

Figure 13-34

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution9
Step 2 – Design Solution

  • Pseudocode uses a condensed form of English to convey program logic

Page 692

Figure 13-35

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 2 design solution10
Step 2 – Design Solution

  • UML (Unified Modeling Language) has been adopted as a standard notation for object modeling and development

Page 693

Figure 13-37

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 3 validate design
Step 3 – Validate Design

  • Check for logic errorsusing test data

Pages 693 - 694

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 4 implement design
Step 4 – Implement Design

  • Implementation of the design includes using a program development tool that assists the programmer by:

    • Generating or providing some or all code

    • Writing the code that translates the design into a computer program

    • Creating the user interface

  • Extreme programming is a strategy where programmers immediately begin coding and testing solutions as soon as requirements are defined

Pages 694 - 695

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 5 test solution
Step 5 – Test Solution

Click to view Web Link,click Chapter 13, Click Web Link from left navigation, then click Beta Testersbelow Chapter 13

Pages 695 - 696

Discovering Computers 2011: Living in a Digital World Chapter 13


Step 6 document solution
Step 6 – Document Solution

  • In documenting the solution, the programmer performs two activities:

Page 696

Discovering Computers 2011: Living in a Digital World Chapter 13


Video electronic arts going mobile
Video: Electronic Arts Going Mobile

CLICK TO START

Discovering Computers 2011: Living in a Digital World Chapter 13


Summary
Summary

Page 696

Discovering Computers 2011: Living in a Digital World Chapter 13



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