diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
new file mode 100644
index 0000000..b6b6010
--- /dev/null
+++ b/src/main/c/Calculator/calculator.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+// Function prototypes
+void displayMenu();
+int add(int num1, int num2);
+int subtract(int num1, int num2);
+int multiply(int num1, int num2);
\ No newline at end of file
diff --git a/src/main/c/Quiz/top.h b/src/main/c/Quiz/top.h
index ffa37aa..291481a 100644
--- a/src/main/c/Quiz/top.h
+++ b/src/main/c/Quiz/top.h
@@ -1,7 +1,7 @@
 #ifndef TOP_H
 #define TOP_H
 
-void quiz();
+    
 struct Frage erstelleFrage(char *text, char *antwort1, char *antwort2, char *antwort3, int korrekteAntwort);
 
 #endif //TOP_H