1 files changed, 16 insertions, 8 deletions
diff --git a/buch/papers/0f1/listings/kettenbruchRekursion.c b/buch/papers/0f1/listings/kettenbruchRekursion.c
index 958d4e1..3caaf43 100644
--- a/buch/papers/0f1/listings/kettenbruchRekursion.c
+++ b/buch/papers/0f1/listings/kettenbruchRekursion.c
@@ -1,19 +1,27 @@
-static double fractionIter0f1(const double b0, const double z, unsigned int n)
+/**
+  * @brief Calculates the Hypergeometric Function 0F1(;c;z)
+  * @param c in 0F1(;c;z)
+  * @param z in 0F1(;c;z)
+  * @param k number of itertions (precision)
+  * @return Result
+  */
+static double fractionIter0f1(const double c, const double z, unsigned int k)
 {
+    //declaration
     double a = 0.0;
     double b = 0.0;
-    double abn = 0.0;
+    double abk = 0.0;
     double temp = 0.0;
 
-    for (; n > 0; --n)
+    for (; k > 0; --k)
     {
-        abn = z / (n * ((n - 1) + b0));  //abn = ak, bk
+        abk = z / (k * ((k - 1) + c));  //abk = ak, bk
         
-        a = n > 1 ? (1 + abn) : 1;  //a0, a1
-        b = n > 1 ? -abn : abn;     //b1
+        a = k > 1 ? (1 + abk) : 1;      //a0, a1
+        b = k > 1 ? -abk : abk;         //b1
 
-        temp = b / (a + temp); 
+        temp = b / (a + temp);          //bk / (ak + last result)
     }
 
-    return a + temp;   //a0 + temp
+    return a + temp;                    //a0 + temp
 }
 \ No newline at end of file