01969_PPT_ch01 - Programming Logic and Design Fifth Edition...

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Unformatted text preview: Programming Logic and Design Fifth Edition, Comprehensive Chapter 1 An Overview of Computers and Logic Programming Logic and Design, Fifth Edition, Comprehensive 2 Objectives • Understand computer components and operations • Learn about the steps involved in the programming process • Learn about the data hierarchy and file input • Use flowchart symbols and pseudocode statements • Use and name variables Programming Logic and Design, Fifth Edition, Comprehensive 3 Objectives (continued) • Use a sentinel, or dummy value, to end a program • Manage large flowcharts • Assign values to variables • Recognize the proper format of assignment statements • Describe data types • Understand the evolution of programming techniques Programming Logic and Design, Fifth Edition, Comprehensive 4 Understanding Computer Components and Operations • Hardware and software: the two major components of any computer system • Hardware : equipment, or devices • Software : programs that contain instructions for the computer • Four major operations in a computer: – Input – Processing – Output – Storage Programming Logic and Design, Fifth Edition, Comprehensive 5 Understanding Computer Components and Operations (continued) • Input devices : allow data to enter the computer – Mouse, keyboard, scanner • Processing : working on the data – Organizing data – Checking data for accuracy – Mathematical or other manipulations on data • Central Processing Unit (CPU) : hardware that performs the tasks Programming Logic and Design, Fifth Edition, Comprehensive 6 Understanding Computer Components and Operations (continued) • Output devices : provide data to the user – Printer, monitor, speakers • Programming language : special language containing instructions for the computer – Visual Basic, Java, C#, C++, COBOL • Syntax : rules governing word usage and punctuation in the language Programming Logic and Design, Fifth Edition, Comprehensive 7 Understanding Computer Components and Operations (continued) • Machine language : controls the computer’s on/off circuitry • Compiler or interpreter : software that translates programming languages to machine language • Program must be free of syntax errors to be run, or executed , on a computer • To function properly, the logic must be correct Programming Logic and Design, Fifth Edition, Comprehensive 8 Understanding Computer Components and Operations (continued) • What is wrong with this logic for making a cake? Stir Add two eggs Bake at 350 degrees for 45 minutes Add three cups of flour Programming Logic and Design, Fifth Edition, Comprehensive 9 Understanding Computer Components and Operations (continued) • Logic errors , or semantic errors , are more difficult to locate than syntax errors • Logic for multiplying a number by 2 (includes input, processing, and output statements) Get input number....
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This note was uploaded on 08/18/2011 for the course COMP 230 taught by Professor Deokar during the Summer '11 term at DeVry Cincinnati.

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01969_PPT_ch01 - Programming Logic and Design Fifth Edition...

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