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Hardware & Software
Programming
COMP102 Prog. Fundamentals I: Software / Slide 2
Four components of a computer system: CPU - central processing unit
– Makes decisions, performs computations, and delegates input/output requests
Memory: Disk Drives, CD drives, Tape drives, USB flash drives.
– Stores information Input devices: Keyboard, Mouse,
– Gets information from the user to the computer Output devices: monitor
– Sends information from computer to the user
Hardware
COMP102 Prog. Fundamentals I: Software / Slide 3
Hardware
Memory
CPU
InputDevices
OutputDevices
COMP102 Prog. Fundamentals I: Software / Slide 4
SystemSoftware
ApplicationSoftware
Software
COMP102 Prog. Fundamentals I: Software / Slide 5
Application software Easy-to-use programs designed to perform
specific tasks System software
Programs that support the execution and development of other programs
Two major types–Operating systems–Translation systems (compilers & linkers)
Software
COMP102 Prog. Fundamentals I: Software / Slide 6
Copyright © 2000 by Brooks/Cole Publishing Company
A division of International Thomson Publishing Inc.
COMP102 Prog. Fundamentals I: Software / Slide 7
Computer Software Relationships
UserInterface
Basic Input and Output Services (BIOS)• needed for a computer to boot up
User Interface Operating System
User Interface Application Programs
Computer Hardware
COMP102 Prog. Fundamentals I: Software / Slide 8
Application Software
Application software makes computer popular and easy to use
Common application software: Microsoft Word, WordPerfect PowerPoint Netscape, Internet Explorer PhotoShop, Photo-Paint Quick Time Dreamweaver
COMP102 Prog. Fundamentals I: Software / Slide 9
Controls and manages the computing resources Examples
Windows, Unix, MSDOS, Important services that an operating system
provides: Security: prevent unauthorized users from accessing
the system Commands to manipulate the file system Input and output on a variety of devices Window management
Operating System
COMP102 Prog. Fundamentals I: Software / Slide 10
What is a (programming) language?
A program needs to be written in a language There are many programming languages
Low-level, understandable by a computer High-level, needs a translator!
C++ is a high level programming language
A sequence of instructions
A program
(in computer language)An algorthm
(in human language)