Data commit

Task/Feigenbaum-constant-calculation/Groovy/feigenbaum-constant-calculation.groovy

@@ -0,0 +1,29 @@
+class Feigenbaum {
+    static void main(String[] args) {
+        int max_it = 13
+        int max_it_j = 10
+        double a1 = 1.0
+        double a2 = 0.0
+        double d1 = 3.2
+        double a
+
+        println(" i       d")
+        for (int i = 2; i <= max_it; i++) {
+            a = a1 + (a1 - a2) / d1
+            for (int j = 0; j < max_it_j; j++) {
+                double x = 0.0
+                double y = 0.0
+                for (int k = 0; k < 1 << i; k++) {
+                    y = 1.0 - 2.0 * y * x
+                    x = a - x * x
+                }
+                a -= x / y
+            }
+            double d = (a1 - a2) / (a - a1)
+            printf("%2d    %.8f\n", i, d)
+            d1 = d
+            a2 = a1
+            a1 = a
+        }
+    }
+}