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#!/usr/bin/java --source 11
public final class mandelbrot
{
static private final int MAXITER = 50;
static private final double LIMIT = 4.0;
private static void mandelbrot(int w, int h)
{
double xmin = -1.5;
double ymin = -1;
double invn = 2.0 / w;
boolean checkNext = true;
int x, y, k;
double cr, ci, zr, zi, tr, ti, t;
for (y = 0; y < h; y++)
{
ci = y * invn + ymin;
for (x = 0; x < w; x++)
{
zr = 0;
zi = 0;
tr = 0;
ti = 0;
cr = x * invn + xmin;
t = 0;
if (checkNext)
{
for (k = 1; k <= MAXITER; k++)
{
zi = 2.0 * zr * zi + ci;
zr = tr - ti + cr;
ti = zi * zi;
tr = zr * zr;
t = tr + ti;
if (t != t || t > LIMIT)
break;
}
if (k > MAXITER)
{
System.out.print("1");
checkNext = false;
}
else
{
System.out.print("0");
}
}
else
{
for (k = 1; k <= MAXITER; k++)
{
zi = 2.0 * zr * zi + ci;
zr = tr - ti + cr;
ti = zi * zi;
tr = zr * zr;
}
t = tr + ti;
if (t != t || t >= LIMIT)
{
System.out.print("0");
checkNext = true;
}
else
{
System.out.print("1");
}
}
}
System.out.println();
System.out.flush();
}
}
public static void main(String[] args)
{
for (int i = 1; i <= 20; i++)
mandelbrot(200, 200);
}
}
/*#!/usr/bin/env gbs3
Private Const MAXITER As Integer = 50
Private Const LIMIT As Float = 4.0
Sub Mandelbrot(W As Integer, H As Integer)
Dim XMin As Float = -1.5
Dim YMin As Float = -1
Dim InvN As Float = 2.0 / W
Dim CheckNext As Boolean = True
Dim X, Y, K As Integer
Dim Cr, Ci, Zr, Zi, {Tr}, Ti, T As Float
For Y = 0 To H - 1
Ci = Y * InvN + YMin
For X = 0 To W - 1
Zr = 0
Zi = 0
{Tr} = 0
Ti = 0
Cr = X * InvN + XMin
If CheckNext Then
For K = 1 To MAXITER
Zi = 2.0 * Zr * Zi + Ci
Zr = {Tr} - Ti + Cr
Ti = Zi * Zi
{Tr} = Zr * Zr
T = {Tr} + Ti
If IsNan(T) Or If T > LIMIT Then Break
Next
If K > MAXITER Then
Print "1";
CheckNext = False
Else
Print "0";
Endif
Else
For K = 1 To MAXITER
Zi = 2.0 * Zr * Zi + Ci
Zr = {Tr} - Ti + Cr
Ti = Zi * Zi
{Tr} = Zr * Zr
Next
T = {Tr} + Ti
If IsNan(T) Or If T > LIMIT Then
Print "0";
CheckNext = True
Else
Print "1";
Endif
Endif
Next
Print
Next
End
Dim I As Integer
For I = 1 To 20
Mandelbrot(200, 200)
Next
Error CStr(Jit.Time)
*/
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