Introduction Lesson1 :Introduction 1.1 A brief description of Visual Basic VISUAL BASIC is a high level programming language evolved from the earlier DOS version called BASIC. BASIC means Beginners' Allpurpose Symbolic. By Ted Felix. Explains most of the QBASIC language in easy-to-understand terms. Beginners: Link: Description: Author: Animated Graphics in QBasic: Using DATA statements to make graphics. Beginner stuff, loads of source. Mallard: Game Tutorial Series - Graphics: SCREEN, PSET, LINE, CIRCLE and DATA. QBasic (Microsoft Quick Beginners All purpose Symbolic Instruction Code) is an IDE and interpreter for a variety of the BASIC programming language which is based on QuickBASIC. Code entered into the IDE is compiled to an. David Krut Projects has locations in Johannesburg, Cape Town and New York, and is an alternative arts institution dedicated to encouraging an awareness of and careers in the arts and related literature and media, and to. This Section contains Online books on:Free Programming Languages Books Download free Programming Languages Ebooks online Programming Languages tutorials downloadable e-books downloads zip chm rar. Win32 Shell Scripting Tutorial Ashley J.S Mills <[email protected]> Copyright © 2005 The University Of Birmingham Table of Contents 1. Introduction to Win32 Shell Scripting.
QBASIC Programming for Kids. In Windows 9. 8, try the Windows 9. Windows ME steps below. It is the same as one of. I don't have a Windows 9.
History. Microsoft released the first version of QuickBASIC on August 18, 1985 on a single 5.25' 360kB floppy disk. QuickBASIC version 2.0 and later contained an Integrated Development Environment (IDE), allowing users to edit. Ted's Book Collection. The 1970's and 1980's were a fascinating time in the history of computers. The personal computer became a reality. Many kids had easy access to computers. There was no Internet. The computers that you.
In Windows ME, click on "Start", then "Programs", then. Accessories", then "MS- DOS Prompt". In Windows NT 4, I believe it was called the "Command Prompt".
Try the steps described for Windows 2. In Windows 2. 00. Command Prompt" and you. Start, then Programs, then Accessories. Command Prompt. In Windows XP, it is called the "Command Prompt" and you can.
Start, then All Programs, then Accessories. Command Prompt. You will get the black window with. C: \WINDOWS> _" prompt.
Now you're ready for the next step. Starting QBASICQBASIC may not be on your computer. Don't be alarmed. Appendix A shows you how to get it there.
At the. "C: \WINDOWS> _" prompt, try typing. Enter> key. If you get a blue screen with. Survival Guide", you made it! If instead you got something about a "Bad command or file name",you need to check out Appendix A to get QBASIC. Don't worry, we'll wait right here for you.
Survival Guide? We won't be using the survival guide right now, so press. Esc> (escape) key to get the big blank blue screen. Now we're ready to program. Getting Out. If you need to leave QBASIC, you can click on "File" on. QBASIC's menu and. Exit" to get back to DOS. At the "C: \WINDOWS> _".
Enter> key to get rid of the. DOS window. Chapter 2 - PRINTFollow Along. I'm assuming you will be following along with. QBASIC in front of you.
This won't be much fun. So power up the computer and get. QBASIC's blue screen up in front of you. Go. ahead and press the. Esc> key to "clear this dialog box" when. QBASIC's Screen. Before we start, let's take a look at QBASIC's screen.
At the top is QBASIC's menu. The menu has the following. File, Edit, View, Search, Run, Debug, Options, and Help. Clicking on any of these with the mouse will show more. Just under the menu is the word "Untitled".
This means. we haven't given the current program a name. This will change. The big blue area with the. These are the most important areas to know for right now. We will learn more about the rest of QBASIC's screen as we. QBASIC Editor. If you've used your computer to do school work or write a report. Backspace> , < Delete> , < Insert>..) work.
In case you haven't used these. Backspace> - Removes the character to the left of the cursor. Delete> - Removes the character at the cursor. Left Arrow> - Moves the cursor left. Right Arrow> - Moves the cursor right. Up Arrow> - Moves the cursor up. Down Arrow> - Moves the cursor down.
Home> - Moves the cursor to the start of a line. End> - Moves the cursor to the end of a line. Your First Program. With the blinking cursor ( _ ) at the.
PRINT "Welcome to QBASIC. Your wish is my command.". Make sure it looks exactly like that. The quotation. marks (") are very important. If you make any. mistakes, use the < Backspace> key to correct them. That's great, but what does it do? You have to run. it to find out.
Look for the word "Run" on QBASIC's. Click on it. Now. Start. Restart, and Continue).
Click on Start to run your. You may have to look around on the screen. C: \WINDOWS> qbasic. Welcome to QBASIC.
Your wish is my command. PRINT prints things to the screen. Don't forget to. put what you want to say in double- quotation marks (").
At the bottom of the screen you will see a message. Press any key to continue". Press < Enter> to. QBASIC. This is QBASIC's way of. As a cool shortcut, use ?
PRINT. Try it. Press. Enter> to start typing on a new line. Now type this. ? "Programming is fun.". Enter> again. Isn't that nice?
The ? becomes the word PRINT. That. should save us a lot of typing in the long run. You can try running the program again (remember? Click on Run, then Start on the menu). You should see. something like this.
C: \WINDOWS> qbasic. Welcome to QBASIC. Your wish is my command. Welcome to QBASIC.
Your wish is my command. Programming is fun.
It was probably a bit hard to find your messages. Wouldn't. it be nice to be able to clear all that stuff off. CLS", which stands for CLear Screen. You will need to put CLS.
PRINT "Welcome to QBASIC. Your wish is my command.". PRINT "Programming is fun.". Run it. Remember, click on Run and then Start in. QBASIC's menu. You can also run the program by. Shift> key and holding it down while. F5> (that's what Shift+F5 means on the.
Another handy shortcut. That's much better. Only your message is on the. Let's start a new program. To get rid of the. File" on QBASIC's menu and.
File menu with New, Open.., Save. Click on "New". QBASIC will now tell. Save it now?". Let's. You can always type it in again.
Click on < No > with the mouse. We'll learn how to save. Chapter 8. Now you should have a clean blue screen. Type in. Make sure you get the semi- colon (; ) at the end of. PRINT line, and the space between the word. You don't need. to use my name, put yours in there instead ("Jack.
Now run it. DO and LOOP will do whatever is between the. DO and the LOOP over and over again. Ok, that's great.
HOW DO I. STOP IT!? Press the < Ctrl>. Control) key and hold it down while pressing the. Pause> key. The < Pause> key is usually at the top.
This is called "pressing the < Break> key." Don't. QBASIC. Maybe. it should have been called the "brake" key. On laptop keyboards, the break key might be. Sometimes you have to press the. Fn" key followed by the key that says break. Sometimes. it is color- coded to help you figure it out. You'll. know you have it when the program stops and the editor.
Notice that PRINT has two spaces in front. This is called "indenting" and it makes the program. You can see. the beginning and the end of the DO.. LOOP more clearly. QBASIC doesn't care about indenting, only people do.
It's. important to make your programs look nice so other people. So far our programs have only talked to us. Let's. write one that will listen. Get rid of the previous. File, then New on QBASIC's.
Click on < No > when it asks if you want to. Try this. INPUT "Enter your name: ", Name$. PRINT "Hello, "; Name$; ". How are you today?". Don't forget the comma (,) between "Enter your. Name$. Run it. When it asks, type your. Enter> key. "Name$" is called a "variable".
To be variable. means that things can change. Try running the. program again, but this time type in a friend's. Enter> key). Sure enough. INPUT Name$ takes what you type at the keyboard. Name$ variable. PRINT Name$. Name$ variable. Variables hold letters and numbers.
The dollar. sign ($) means this variable can hold letters. These are called "string variables". Variables without a dollar sign can only hold. We'll be seeing them soon. You can call your variables anything you want. Try going back through this program and changing.
Name$" to "Fred$". What happens when you. Another way to think of a variable is to imagine. Put. "Name$" on it.
This is the bucket's (variable's) name. Now take a piece of paper. Now the variable Name$ has your. Computer variables can only hold. PRINT and Variables. When you want to PRINT what's in a variable, leave. This program will.
INPUT "Enter your name: ", Name$. PRINT "Name$". PRINT Name$. The first PRINT statement prints Name$ on the screen. The second PRINT statement prints whatever name you. Learned. Chapter 6 - IF..
THENLet's make that last program a little smarter. I want to be able to identify intruders playing. Wouldn't it be great if the.
How about. INPUT "Enter your name: ", Name$. IF Name$="Mike" THEN. PRINT "Go Away!".
PRINT "Hello, "; Name$; ". How are you today?". You can change the Name$="Mike" to Name$="Joe".
Run the program. and type in your name (hopefully it isn't Mike). You should see the same old message as before. Now run it again and try entering "Mike" (or "Joe". Mike" Is Not The Same As "mike"If it didn't tell the right person to go away. Mike" is not the same as "mike", so if you don't. Make sure you enter the name. IF.. THENThe "IF.
THEN. ELSE. END IF" statement in this program. Name$ has "Mike" in it. If. so, then it does the PRINT statement after the. THEN". If Name$ isn't "Mike", it does the PRINT.
ELSE". "END IF" tells QBASIC that. IF" is over. Conditions. The Name$="Mike" portion of the IF.. THEN is. called the "condition". With numbers you can. INPUT "Enter a number: ", Number.
IF Number < 1. THEN. PRINT "Your number was less than 1. PRINT "Your number was greater than or equal to 1. If you want to check for "greater than", use "Number > 1. Equals works just like before, "Number = 1. Another option is.
Number < > 1. IF.. THEN is one of the most powerful features of QBASIC. Using IF.. THEN can make your programs very interesting. It lets your program make decisions and do something.
Learned. Chapter 7 - Numbers. Computers are very good at math. Let's. get the computer to do some math for us. Here's. a simple multiplication calculator.
INPUT "Enter the first number: ", A. INPUT "Enter the second number: ", B. PRINT "The answer is: "; A * B. If you have trouble finding the star (or asterisk "*") on the. Run it, and enter. It does an excellent job multiplying for you.
Variables and Math. A and B are variables, just like Name$. Unlike. Name$, A and B do not have a dollar- sign after their. This is because they are only holding. Star"A * B" means "A times B".
QBASIC doesn't use "X" for multiplication because you. X". What else? Try changing the "A * B" to "A - B" for subtraction. A + B" will do addition, and "A / B" will do. Why "/" for division? Because there's. no division sign key on the keyboard. At least I. haven't found one.
Expressions"A * B", "A + B", "A - B", and "A / B" are called mathematical. Learned. Variables with numbers. INPUT with numbers. Multiplication, Division, Addition, Subtraction. Chapter 8 - Saving.
Before we get into some fairly big programs, let's look at. Location Is Everything. The first thing we need to think about is where we are going. The two main places we can save things are. Let's look at both places. Saving To Floppy. Using a floppy is a good idea if you don't want other people.
The floppy can be removed from the.