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Atari Mega Archive 2
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Atari Mega Archive CD - Volume 2.iso
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8bit
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cislib_a
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center.pas
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Pascal/Delphi Source File
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1995-04-22
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978b
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28 lines
PROCEDURE Center(Line : String; VAR xpos : Integer; ypos : Integer);
(*
by Erik C. Warren, 14 January, 1987
for UPDATE...KYAN, Jan./Feb. '87
Prior to calling this routine, you must have declared:
CONST MaxString = n; (n is a number of your choice)
TYPE String = ARRAY[1..MaxString] OF Char;
You must also have included the files "POSITION.I" and "LENGTH.I"
from the K.P. disk, side two.
xpos must be passed by reference as a VARiable, not as a value
parameter; it will be changed to reflect the horizontal position
at which the string is written to.
ypos is the vertical position you want the string to be written at.
*)
CONST MaxCols = 40; (* or 80 if your system has the capability *)
BEGIN
(* Calculate new x *)
xpos := MaxCols DIV 2 - 1 - (Length(Line) DIV 2);
IF xpos < 0 THEN xpos := 0; (* range check *)
Position(xpos,ypos); (* Goto X,Y cursor coordinates *)
Write(Line) (* Write string, no CR *)
END; (* Center *)