diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index a338063..cabb5c4 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -90,12 +90,15 @@ int main() {
 
  case 'C':
  case 'c':
+ do {
+    printf("which operation would you like to have?(+ for addition, - for subtraction,* for multiplication and r for return :");
+    scanf(" %c", &auswahl2);
 
 
 
 
 
-
+  } while (auswahl2 != 'R' && auswahl2 != 'r');
 
             break;
         case 'Q':