diff --git a/src/inputHandling.c b/src/inputHandling.c
index f2edfc1..d4f4446 100644
--- a/src/inputHandling.c
+++ b/src/inputHandling.c
@@ -83,15 +83,16 @@ char* getnumbers(char* data, int length, calc_op* structure_ref){ //input sind:
         token = strtok(NULL, "+"); //Sucht von der letzten Plus-Stelle an weiter
     }
     structure_ref->arraylength=i; //Länge des Arrays (also zu berechnende Zahlen) gespeichert
-    if (readFunction(splitPnt, strlen(splitPnt)+1)!=opNotSupported){
-        return NULL;
-    } else {
+    op type = readFunction(splitPnt, strlen(splitPnt)+1);
+    if (type != opNotSupported && type != opEmpty){
         return splitPnt;
+    } else {
+        return NULL;
     }
 }
 
 void printstruct(calc_op* formula){
-    printf("Berechnung: %s", formula->formel);
+    printf("Berechnung: %s\n", formula->formel);
     switch (formula->funktionstyp) {
         case opAdd:
             printf("Rechenoperation: Addition\n"); break;