cleanup

S1/GdCP/klausur_c_1/sqrtrec.c

@@ -0,0 +1,31 @@
+#include<float.h>
+#include<stdio.h>
+#include<math.h>
+
+//#include "testing-0xx.h"
+
+double sqrt_rec(double x, double p) {
+  // Check for edge cases
+  if (x == 0 || x < 0) {
+    return 0;
+  } 
+
+  // Get the next element like the formula provided
+  double next = 0.5 * (p + x/p);
+
+  // Decide whether to go further
+  if (fabs(next - p) < DBL_EPSILON) {
+    return next;
+  } 
+
+  // Recusrevely try the next element in the series
+  return sqrt_rec(x, next);
+}
+
+int main() {
+  printf("%f\n", sqrt_rec(2, 1));
+  printf("%f\n", sqrt_rec(4, 1));
+  printf("%f\n", sqrt_rec(8, 1));
+  printf("%f\n", sqrt_rec(9, 1));
+}
+