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QBasic & Borland Pascal & C
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Delphi5.iso
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Q_BASIC.450
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WINDO_EX.BAS
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BASIC Source File
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1988-09-17
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759b
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28 lines
'
' *** WINDO_EX.BAS -- WINDOW statement programming example
'
PRINT "Press ENTER to start."
INPUT;"",A$
SCREEN 1 : COLOR 7 'Grey screen.
X = 500 : Xdelta = 50
DO
DO WHILE X < 525 AND X > 50
X = X + Xdelta 'Change window size.
CALL Zoom(X)
FOR I = 1 TO 1000 'Delay loop.
IF INKEY$ <> "" THEN END 'Stop if key pressed.
NEXT
LOOP
X = X - Xdelta
Xdelta = -Xdelta 'Reverse size change.
LOOP
SUB Zoom(X) STATIC
CLS
WINDOW (-X,-X)-(X,X) 'Define new window.
LINE (-X,-X)-(X,X),1,B 'Draw window border.
CIRCLE (0,0),60,1,,,.5 'Draw ellipse with x-radius 60.
PAINT (0,0),1 'Paint ellipse.
END SUB