Q Basic, 2nd Edition

This easy-to-understand introduction to QuickBASIC provides complete examples and step-by-step explanations. This edition has been thoroughly updated with greater emphasis on motivation for concepts as they are introduced. Programming problems vary in level of difficulty, more high level problems have been added. The end-of-chapter program examples integrate topics from previous chapters. Cover Title Contents-in-Brief Contents Preface 1 Introduction to Computer Systems and QBasic Introduction What Computers Can Do The Components of a Computer System The System Unit Peripheral Devices The Categories of Computer Systems Supercomputers Mainframes Minicomputers Microcomputers Getting Started The Disk Operating System Using QBasic The Opening Screen The Menu Bar The Title Bar The Reference Bar The Immediate Window The File Menu The View Menu The Run Menu Entering and Editing Programs A Practice Program Being a Responsible Computer User Using Hardware Properly Ethical Software Use Controlling System Access Summary Points Key Terms Review Questions 2 Introduction to Structured Programming and Problem Solving Introduction Programming Languages Machine Language Assembly Language High-Level Languages Structured Programming Using Modules The Three Basic Control Structures Structured Programming Languages The Programming Process Defining and Documenting the Problem Designing and Documenting a Solution Writing and Documenting a Program Debugging and Testing a Program Summary Points Key Terms Review Questions 3 Fundamental Statements Introduction QBasic Statement Components Constants Variables Keywords Simple QBasic Statements Assigning Values to Variables Arithmetic Operations Displaying Results The END Statement The Immediate Window Getting Help Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions 4 Input and Output Introduction Storing Data in Variables Entering Data During Execution Displaying Prompts for the User Formatting Results Semicolon Print Zones TAB Function SPC Function LOCATE Statement More Tips on Formatting Output Sending Output to the Printer The PRINT USING Statement Placing Multiple Statements on a Single The Edit Menu Selecting a Program Segment Cut Copy Paste Clear Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 5 Introduction to Control Structures Introduction The Block IF Statement Relational Operators The Double-Alternative Decision The ELSEIF Clause Nesting Statements Indenting Control Structures The SELECT CASE Statement Menus Logical Operators Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 6 Modularizing Programs Introduction An Example of a Simple SUB Procedure Typing Procedures Passing Arguments to SUB Procedures Local Variables Using Structure Charts to Modularize Pass by Reference Versus Pass by Value Advantages of Using Procedures Using Stubs to Implement Programs Mastering Program Development Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 7 Loop Structures Introduction Advantages of Loops The DO...LOOP The DO WHILE...LOOP Controlling Loops The DO UNTIL...LOOP The EXIT Statement The FOR...NEXT Loop Rules for Using FOR...NEXT Loops Nested Loops Comparing Loop Structures Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 8 Functions and Debugging and Testing Introduction Standard Functions Numeric Functions String Functions FUNCTION Procedures Writing User-Friendly Programs Debugging and Testing The Integrated Debugger Testing Methods More on Documentation Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 9 Arrays and Searching and Sorting Introduction Subscripts Dimensioning an Array One-Dimensional Arrays Storing Data in an Array Printing the Contents of an Array Performing Calculations on Array Two-Dimensional Arrays Storing Data in and Printing Two-Dimensional Arrays Adding Rows Adding Columns Sorting an Array Bubble Sort Shell Sort Searching Sequential Search Binary Search Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 10 Records and Files Introduction Data Types Records Defining a Record Storing Data in a Record Arrays of Records Files Secondary Storage File Access Methods Using Sequential Files File Position Pointers Creating and Accessing a Sequential File Closing a File Writing to a Sequential File Appending Records to a Sequential File Reading from a Sequential File Creating a Summary Report Using Random-Access Files Creating a Random-Access File Storing Records in a Random-Access File Reading Records in a Random-Access File Comparison of Random-Access and Sequential Files Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems 11 Graphics and Sound Introduction Graphics Text Mode Graphics Modes Mixing Text and Graphics Graphics Commands The LOCATE Statement The PRESET and PSET Statements The LINE Statement The CIRCLE Statement The DRAW Statement Using Loops in Graphics Color Graphics Filling Objects with Color Sound The BEEP Statement The SOUND Statement The PLAY Statement Mastering Program Development Problem Definition Solution Design The Program Programming Hints Summary Points Key Terms Review Questions Debugging Exercises Programming Problems Level 1 Level 2 Challenge Problems Appendix A Keywords for QBasic Appendix B QBasic Operators Appendix C ASCII Codes Table Appendix D Microsoft QuickBASIC Version 4.5 Appendix E Answers to Learning Check Exercises Glossary Index QBasic Reference Card This text introduces the development of well-designed, reliable programs using the most popular of the structured BASICs for the IBM environment. This text provides an effective mix of general, business, and mathematically-oriented problems.

An introduction to a quick form of BASIC known as QBasic.