RosettaCodeData/Task/Julia-set/ALGOL-68/julia-set.alg
2023-07-01 13:44:08 -04:00

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1.2 KiB
Text

BEGIN
REAL c real, c imaginary;
STRING real and imaginary := IF argc < 3 THEN "-0.8" ELSE argv( 3 ) FI
+ " "
+ IF argc < 4 THEN "0.156" ELSE argv( 4 ) FI
+ " "
;
FILE numbers;
associate( numbers, real and imaginary );
get( numbers, ( c real, c imaginary ) );
print( ( fixed( c real, -8, 4 ), fixed( c imaginary, -8, 4 ), newline ) );
FOR v FROM -100 BY 10 TO 100 DO
FOR h FROM -280 BY 10 TO 280 DO
REAL x := h / 200;
REAL y := v / 100;
CHAR plot char := "#";
FOR i TO 50
WHILE
REAL z real = ( x * x ) - ( y * y ) + c real;
REAL z imaginary = ( x * y * 2 ) + c imaginary;
IF z real * z real <= 10000
THEN TRUE
ELSE
plot char := " ";
FALSE
FI
DO
x := z real;
y := z imaginary
OD;
print( ( plot char ) )
OD;
print( ( newline ) )
OD
END