The Basics of QBASIC

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SoCoder -> Article Home -> Coding Basics

HoboBen	Created : 15 September 2006 Edited : 16 November 2006 System : Windows Language : QBasic The Basics of QBASIC Basic was never basic-er.
A "REM" is a comment or reminder. You need QBasic or comptable BASIC running program to, er, run. (Old micros and Windows 95 machines have 'em all ready, but you can grab M$ QBasic here) The rest speaks for itself - it's pretty much English! This has really been included for your interest only, and I wouldn't reccomend starting to write games in QBasic today when there's so much else available. Microsoft QBasic doesn't compile its code for you either, so you're stuck with source only distributions. REM Simple QBasic Guessing Game REM To get different numbers each time we play, we must randomise the timer. RANDOMIZE TIMER REM That was easy! REM Now we'll clear the screen, otherwise we get last program's text left over... CLS REM Easier still! Now, "PRINT" writes text to the screen. REM A "PRINT" command on its own makes a new line, and all "PRINT"ed text ends in a new line. PRINT "Hello, World!" PRINT PRINT "I am thinking of a number between one and ten..." n = (INT(RND * 10)) + 1 REM "RND" generates a floating (decimal number) between 0 and 1. REM We multiply it by 10 to get a number between 0 and 9.999... REM We turn it into an integer (whole number) with the "INT" command, REM which limits the number to between 0 and 9 (all decimals are cut REM off, with no rounding), and then we add one to get a number REM between 1 and 10, and give it to the variable "n". PRINT PRINT "You have three guesses. What is the number?" REM Let's loop through 3 guesses... REM "INPUT" gets input and hands it to g. REM "IF" Statements handle the comparasons with equals, more than REM and less than operators. FOR i = 1 TO 3 INPUT g PRINT IF g = n THEN PRINT "Correct! You win!" END ELSE PRINT "WRONG!" IF n > g THEN PRINT "You guessed too low!" PRINT ELSEIF n < g THEN PRINT "You gessed too high!" PRINT END IF END IF NEXT i REM Oh dear... After three guesses, we still haven't guessed correctly! PRINT "Out of guesses!" PRINT "You lose!" END --v

Comments
Tuesday, 06 March 2007, 13:14
dna	What's the difference between QBasic and FreeBasic?
Friday, 09 March 2007, 15:38
HoboBen	I think QBasic is just older, is all. Freebasic has GUI functions, doesn't it? QBasic Wikipedia FreeBasic Wikipedia
Saturday, 10 March 2007, 22:32
power mousey	yes hobo, QBasic is older than FreeBasic. And even before them....GwBasic and variants of Basic that the young upstart Microsoft wrote for companies such as: Apple.....Apple Basic IBM....a Basic for the IBM PC jr. Tandy....Tandy Basic and also for the first original home computer kit for the masses-->MITS Altair 8800. and the first original Basic from Dartmouth College. and hey everybody, I even remembered when I used to have and playing video games on my Atari 2600....many years ago. I bought Atari Basic for the 2600. Crappy language in a cartridge. You could only display text and make and print math calculations on the screen. And very basic different colored blocks and lines on the screen. I bought it over at Longs Drugs store and I took it back after using it for a few hours. I fortunately got a refund and used the money to eat at McDonalds and for some gas for my car too. cheers,

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