QBasic/Sample Programs

Calculator

This program can be used to make a simple, functioning calculator, very simply.

Rem calculator
cls
10
print "input first operand"
input a
print "select operation"
input b
print "addition(a)"
print "subtraction(s)"
print "multiplication(m)"
print "division(d)"
print "exponentification(e)"
print "rooting(r)"
print "Quit(q)"
do 
next$ = inkey$
loop until next$ <> "" 
gosub input_var2

select case next$
case "a"
c = a + b
print "sum is:";c
case "s"
c = a - b
print "Difference is:";c
case "m"
c= a*b
print "Product is :";c
case "d"
c = a/b
print "Quotient is:";c
case "e"
c = a^b
print "Exponentification is:"c
case "r"
c = a^ 1/b
print "Root is:";c
case "q"
end

end select
sleep 3
goto 10







sub input_var
input "enter second operand";b
end sub

For reference goto Basic Math

Basic Game

Uses animation to make a simple game.

SCREEN 7
COLOR 15, 1


_MOUSEHIDE
CLS
LOCATE 5, 1
PRINT "GUNSHOTS"

DO
    NEXT$ = INKEY$
LOOP UNTIL NEXT$ <> ""

CLS
LOCATE 5, 1
PRINT "In this game, you require to bring"
PRINT ""
PRINT "the crosshairs to the box"
PRINT ""
PRINT " , which is the target ,"
PRINT ""
PRINT " and click to shoot it."
PRINT ""
PRINT " In this game , you control"
PRINT ""
PRINT "the crosshairs with your mouse."
PRINT ""
PRINT " You will be given a"
PRINT ""
PRINT " fixed number of tries."
PRINT ""
PRINT " The number of times you hit the target,"
PRINT ""
PRINT " you will be given a point "

DO
    NEXT$ = INKEY$
LOOP UNTIL NEXT$ <> ""








CLS
LOCATE 5, 1
PRINT "Get Ready!"

DO
    NEXT$ = INKEY$
LOOP UNTIL NEXT$ <> ""




10
A = INT(RND * 100)
B = INT(RND * 100)

DO: K$ = INKEY$
    20

    DO WHILE _MOUSEINPUT
        CLS

        IF TRY_COUNT > 30 THEN
            CLS
            LOCATE 10, 1
            PRINT "Remarks:"
            IF POINT_COUNT < 10 THEN PRINT "OH NO! NICE TRY!"
            IF POINT_COUNT > 10 AND POINT_COUNT < 16 THEN PRINT "GOOD WORK!"
            IF POINT_COUNT > 15 AND POINT_COUNT < 21 THEN PRINT "GREAT!"
            IF POINT_COUNT > 20 AND POINT_COUNT < 26 THEN PRINT "AMAZING!"
            END
        END IF



        SECOND = VAL(RIGHT$(TIME$, 2))
        IF PREVSEC <> SECOND THEN
            COUNT = COUNT + 1
        END IF

        LOCATE 25, 25
        PRINT POINT_COUNT









        X = _MOUSEX: Y = _MOUSEY
        LINE (X - 10, Y)-(X + 10, Y), 15
        LINE (X, Y - 10)-(X, Y + 10), 15

        LINE (A, B)-(A + 25, B), 15
        LINE (A, B + 25)-(A + 25, B + 25), 15
        LINE (A, B)-(A, B + 25), 15
        LINE (A + 25, B)-(A + 25, B + 25), 15
        PAINT (A, B), (1), 15

        IF _MOUSEBUTTON(1) THEN
            IF X > A AND X < A + 25 AND Y > B AND Y < B + 25 THEN
                POINT_COUNT = POINT_COUNT + 1
                TRY_COUNT = TRY_COUNT + 1
                GOTO 10
            END IF


        END IF

        IF COUNT > 1 THEN
            COUNT = 0
            TRY_COUNT = TRY_COUNT + 1
            GOTO 10

        END IF



        PREVSEC = SECOND
        GOTO 20



    LOOP
LOOP

For reference , goto Advanced Graphics

Clock

A clock which is quite like a digital clock,with no hands.Use draw to make them if you want.

REM  Clock
SCREEN 7

CLS
start:
SCREEN 7
_FONT 16
LOCATE 1, 5
PRINT "CLOCK"
PRINT "________________________________________"

LINE (50, 50)-(100, 100), 1, BF
LOCATE 9, 5
PRINT "TIME"
LOCATE 10, 5
PRINT "CONTROL"
LINE (150, 50)-(200, 100), 2, BF
LOCATE 9, 18.5
PRINT "STOP WATCH"



DO

    exit$ = INKEY$
    IF exit$ = "e" OR exit$ = "E" THEN
        CLS
        SCREEN 7
        COLOR 2, 1
        LOCATE 5, 5
        PRINT "YOU HAVE ABORTED THE CLOCK"





        WHILE close_count <> 10
            close_count = close_count + 1
            LOCATE 7, 5
            PRINT "APPLICATION  ";
            IF close_count MOD 2 = 1 THEN
                PRINT "CLOSING >>>   "
            ELSE
                PRINT "CLOSING   >>> "
            END IF




            SLEEP 1
        WEND

        CLS
        SCREEN 7
        COLOR 10, 0
        END
    END IF


    Mouser mx, my, mb
    IF mb THEN
        IF mx >= 50 AND my >= 50 AND mx <= 100 AND my <= 100 THEN 'button down
            DO WHILE mb 'wait for button release
                Mouser mx, my, mb
            LOOP
            'verify mouse still in box area
            IF mx >= 50 AND my >= 50 AND mx <= 100 AND my <= 100 THEN
                GOTO proccess
            END IF
        END IF
    END IF



    Mouser mx, my, mb
    IF mb THEN
        IF mx >= 150 AND my >= 50 AND mx <= 200 AND my <= 100 THEN 'button down
            DO WHILE mb 'wait for button release
                Mouser mx, my, mb
            LOOP
            'verify mouse still in box area
            IF mx >= 150 AND my >= 50 AND mx <= 200 AND my <= 100 THEN
                time_control = 1
                GOTO proccess
            END IF
        END IF
    END IF
LOOP








proccess:

IF time_control = 0 THEN
    time_enter:
    LOCATE 12, 6
    INPUT "enter time"; t
    IF t > 1800 THEN
        mistake = mistake + 1
        IF mistake > 3 THEN
            PRINT "BLOCKED"
            END
        END IF

        GOTO time_enter
    END IF
END IF

Mouser mx, my, mb
IF mb THEN
    IF mx >= 150 AND my >= 50 AND mx <= 200 AND my <= 100 THEN 'button down
        DO WHILE mb 'wait for button release
            Mouser mx, my, mb
        LOOP
        'verify mouse still in box area
        IF mx >= 150 AND my >= 50 AND mx <= 200 AND my <= 100 THEN
            time_control = 1
            GOTO proccess
        END IF
    END IF
END IF



WHILE INKEY$ <> " "
    SLEEP 1
    count = count + 1
    tc = tc + 1
    BEEP
    CLS
    LOCATE 1, 5
    PRINT "CLOCK"
    PRINT "________________________________________"

    IF time_control = 1 THEN
        LINE (150, 50)-(200, 100), 2, BF
    END IF
    LOCATE 3, 5
    PRINT "CURRENT TIME:"; TIME$
    LOCATE 5, 5
    PRINT "MINUTES:"; minute
    LOCATE 6, 5
    PRINT "SECONDS:"; count
    IF count = 60 THEN
        count = 0
        minute = minute + 1
    END IF

    IF time_control = 0 THEN
        LOCATE 8, 5
        PRINT "TIME LEFT:"; (t - tc) \ 60; ":"; (t - tc) MOD 60
        IF tc = t THEN
            BEEP
            BEEP
            BEEP
            BEEP
            END
        END IF
    END IF
    IF time_control = 1 THEN
        Mouser mx, my, mb
        IF mb THEN
            IF mx >= 150 AND my >= 50 AND mx <= 200 AND my <= 100 THEN 'button down
                DO WHILE mb 'wait for button release
                    Mouser mx, my, mb
                LOOP
                'verify mouse still in box area
                IF mx >= 150 AND my >= 50 AND mx <= 200 AND my <= 100 THEN
                    END
                END IF
            END IF
        END IF
        LOCATE 10, 10
        PRINT "PRESS BUTTON TO END"
    END IF

WEND
GOTO start



SUB Mouser (x, y, b)
    mi = _MOUSEINPUT
    b = _MOUSEBUTTON(1)
    x = _MOUSEX
    y = _MOUSEY
END SUB

This is a little logical combination of all the chapters you have read so far.

Binary Coder

Yes, this is YES a binary decoder, but a binary Coder. This takes any decimal system number and converts it to binary. Run this program to see for yourself.

REM binary
SCREEN 7
COLOR 1, 2

_FONT 16
LOCATE 7, 10
PRINT "Binary Coder"

SLEEP 5

start:

CLS
LOCATE 1, 1
PRINT "Binary coder"
PRINT "_____________"
PRINT ""
PRINT ""
PRINT ""
PRINT ""



INPUT "Enter Decimal number"; a
CLS
LOCATE 1, 1
PRINT "Binary coder"
PRINT "_____________"
PRINT ""
PRINT ""
WHILE a <> 0
    PRINT a MOD 2;
    IF a MOD 2 = 1 THEN
        a = a \ 2
    ELSE a = a / 2
    END IF

WEND
PRINT ""
PRINT ""
PRINT "Binary code is reversed"
WHILE INKEY$ <> " "
WEND
GOTO start

Just the trouble is: the binary code is reversed. You might have guessed it by looking at the last PRINT statement. I still haven't figured out how to reverse it, so I guess you have to do it yourself. And , the WHILE loop has a print statement with the semicolon at the end. That is used to ensure that the next number comes after it, not on the next line.

Projectile Game

Remember Gorillas? Well, take out the graphics and what you get is this:

10
RANDOMIZE TIMER
cor = RND * 150
cor2 = CINT(cor)
IF cor2 < 30 AND cor2 > -30 THEN GOTO 10

PRINT "The object to hit is at coordinates"; cor2

INPUT "enter velocity"; v
INPUT "enter angle"; a
d = ((v ^ 2) * SIN(2 * a)) / 10
PRINT "Hit on:"
PRINT CINT(-d)

IF CINT(-d) < cor2 + 30 AND CINT(-d) > cor2 - 30 THEN
    PRINT "Well Done!"
ELSEIF CINT(-d) < 30 AND CINT(-d) > -30 THEN PRINT "Hey , you hit us!"
ELSE PRINT "Ugh, not on target"
END IF

Huh? Ok, now the maths is complicated , but the formula is basically the same. Here, the projectile has to land between 30 coordinates out of the hit object, or else you lose. See Wikipedia:Projectile motion for more information on the maths part. Tip: Add graphics. It will be a big , fat piece of code, but the final product will be AMAZING!

Check hearing

Ok, now , how high a frequency sound can you hear? Test your hearing with this program:

REM ultrasonic_test
CLS
freq = 20000
DO
    PRINT "Frequency is:"; freq

    SOUND freq, 18.2
    INPUT "Can you hear?"; ans$
    IF ans$ = "no" THEN
        freqrange = freq
        GOTO 10
    END IF
    freq = freq + 100
LOOP
10
freq = freqrange
DO
    PRINT "frequency is:"; freq

    SOUND freq, 18.2
    INPUT "can you hear?"; ans$
    IF ans$ = "no" THEN
        PRINT "your max frequency is:"; freq
        END
    END IF
    freq = freq + 2
LOOP

Check this out!