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CHR_EX.BAS
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BASIC Source File
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1988-09-17
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999b
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32 lines
' *** CHR_EX.BAS ***
'
DEFINT A-Z
' Display two double-sided boxes.
CALL DBox(5,22,18,40)
CALL DBox(1,4,4,50)
END
' Subroutine to display boxes.
' Parameters:
' Urow%, Ucol% : Row and column of upper-left corner.
' Lrow%, Lcol% : Row and column of lower-right corner.
' Constants for extended ASCII graphic characters.
CONST ULEFTC=201, URIGHTC=187, VERTICAL=186, HORIZONTAL=205
CONST LLEFTC=200, LRIGHTC=188
SUB DBox (Urow%, Ucol%, Lrow%, Lcol%) STATIC
' Draw top of box.
LOCATE Urow%, Ucol% : PRINT CHR$(ULEFTC);
LOCATE ,Ucol%+1 : PRINT STRING$(Lcol%-Ucol%,CHR$(HORIZONTAL));
LOCATE ,Lcol% : PRINT CHR$(URIGHTC);
' Draw body of box.
FOR I=Urow%+1 TO Lrow%-1
LOCATE I,Ucol% : PRINT CHR$(VERTICAL);
LOCATE ,Lcol% : PRINT CHR$(VERTICAL);
NEXT I
' Draw bottom of box.
LOCATE Lrow%, Ucol% : PRINT CHR$(LLEFTC);
LOCATE ,Ucol%+1 : PRINT STRING$(Lcol%-Ucol%,CHR$(HORIZONTAL));
LOCATE ,Lcol% : PRINT CHR$(LRIGHTC);
END SUB