1 files changed, 30 insertions, 0 deletions
diff --git a/ll/ding.c b/ll/ding.c
new file mode 100644
index 0000000..b6b4bf2
--- /dev/null
+++ b/ll/ding.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+
+int mandeliter(double x,double y){
+	double a=x,b=y;
+	int n=0;
+	while(n<256){
+		double na=a*a-b*b+x;
+		double nb=2*a*b+y;
+		a=na;
+		b=nb;
+		if(a*a+b*b>4)break;
+		n++;
+	}
+	return n;
+}
+
+int main(void){
+	double x,y;
+	y=1.5;
+	while(y>=-1.5){
+		x=-2;
+		while(x<=1){
+			int n=mandeliter(x,y);
+			printf("%3d ",n);
+			x+=0.0625;
+		}
+		y-=0.125;
+		putchar('\n');
+	}
+}