diff --git a/src/main/c/BasicMode.c b/src/main/c/BasicMode.c
index 7cab631..a9e60fc 100644
--- a/src/main/c/BasicMode.c
+++ b/src/main/c/BasicMode.c
@@ -65,8 +65,14 @@ long long int subtraction(long long int a, long long int b) {
 
 
 int main() {
+     long long int bin1, bin2, dec, result;
+ char auswahl1, auswahl2;
 
+ do {
+     printf("what do you want to do?(A for conversion from decimal base to binary base ,B for conversion from binary base to decimal base ,C for Operation in binary base, Q for stop):");
+     scanf(" %c", &auswahl1);
 
 
+ } while (auswahl1 != 'Q' && auswahl1 != 'q');
     return 0;
 }