Commodore Plus 4 - Page 141

With the CIRCLE command you can draw a circle, ellipse, arc, triangle
or an octagon. The final coordinate is on the circumference of the
circle at the ending arc angle. Any rotation is about the center. Set
ting the Y radius equal to the X radius does not draw a circle, since the
X and Y coordinates are scaled differently, Arcs are drawn from the
— starting angle clockwise to the ending angle. The segment increment
controls the coarseness of the shape, with lower values for inc creating
rounder shapes.
EXAMPLES:
CIRCLE „ 160,100,65,10 Draws an ellipse.
CIRCLE , 160,100,65,50 Draws a circle.
CIRCLE , 60,40,20,18,,,,45 Draws an octagon.
circle , 260,40,20,,,,,90 Draws a diamond.
CIRCLE , 60,140,20,18,,,,120 Draws a triangle.
CLOSE
CLOSE file #
— This command completes and closes any files used by OPEN state
ments. The number following the word CLOSE is the file number to
be closed.
EXAMPLE
CLOSE 2
Logical file 2 is
closed.
CLR CLR
This command erases any variables in memory, but leaves the pro
gram itself intact- This command is automatically executed when a
RUN or NEW command is given, or when any editing is performed.
CH/ID CMD file # [.write list]
CMD sends the output which normally would go to the screen (i.e.
PRINT statement, LISTS, but not POKEs into the screen) to another
device instead. This could be a printer, or a data file on tape or disk.
This device or file must be OPENed first. The CMD command must
be followed by a number or numeric variable referring to the file.