1 files changed, 12 insertions, 4 deletions
diff --git a/buch/papers/0f1/listings/kettenbruchIterativ.c b/buch/papers/0f1/listings/kettenbruchIterativ.c
index befea8e..d897b8f 100644
--- a/buch/papers/0f1/listings/kettenbruchIterativ.c
+++ b/buch/papers/0f1/listings/kettenbruchIterativ.c
@@ -1,5 +1,13 @@
-static double fractionRekursion0f1(const double c, const double x, unsigned int n)
+/**
+  * @brief Calculates the Hypergeometric Function 0F1(;b;z)
+  * @param b0 in 0F1(;b0;z)
+  * @param z in 0F1(;b0;z)
+  * @param n number of itertions (precision)
+  * @return Result
+  */
+static double fractionRekursion0f1(const double c, const double z, unsigned int n)
 {
+    //declaration
     double a = 0.0;
     double b = 0.0;
     double Ak = 0.0;
@@ -21,15 +29,15 @@ static double fractionRekursion0f1(const double c, const double x, unsigned int
         else if (k == 1)
         {
             a = 1.0; //a1
-            b = x/c; //b1
+            b = z/c; //b1
             //recursion fomula for A1, B1
             Ak = a * Ak_1 + b * 1.0;
             Bk = a * Bk_1;
         }
         else
         {
-            a = 1 + (x / (k * ((k - 1) + c)));//ak
-            b = -(x / (k * ((k - 1) + c)));   //bk
+            a = 1 + (z / (k * ((k - 1) + c)));//ak
+            b = -(z / (k * ((k - 1) + c)));   //bk
             //recursion fomula for Ak, Bk
             Ak = a * Ak_1 + b * Ak_2;
             Bk = a * Bk_1 + b * Bk_2;